CN205054243U - Other CT scanner of small -size bed - Google Patents

Abstract

The utility model discloses an other CT scanner of small -size bed, include: a machine support. Rotary part, imaging system, it has the setting of the axle of following central symmetry and is in X ray source module and the detector subassembly of rotary part on with the lateral wall, the X ray source module with rotary part is with rotation axis connection, but the detector subassembly comes from with corresponding receipt of the mode of translation the emergent ray of X ray source module, and the tow chain part, it is striden and establishes rack side wall is last, stride establish length no longer than the semi -perimeter of frame, the one end of tow chain part is fixed in the frame, the other end is followed the rotary part activity sets up on the lateral wall of frame, the cable passes through the tow chain part connect with imaging system. The utility model discloses that mainly solve is the ground requirement very high technical problem of CT scanner to the work -yard.

Description

The other CT scanner of small-sized bed

Technical field

This utility model relates to a kind of medical apparatus and instruments, and more particularly, this utility model relates to the other CT scanner of a kind of small-sized bed.

Background technology

In China, along with national health demand constantly increases, central nervous system disease development is fast in addition, and the state of an illness is critical, needs the patient carrying out Cranial Computed Tomography scanning day by day to increase every year because of brain diseases.At present, what need to carry out brain scans every year about has 2,000 ten thousand.But, the patient some be in a bad way delivers to CT Room and carries out the abnormally dangerous even possibility of scanography, because pass on patient to CT Room time, usually need the use being forced to temporarily stop various important physiology monitoring and some crash equipments, this is making patients's state of an illness or cause the generation of complication likely, and is difficult to when change of illness state provide in good time monitoring and treatment measure.Therefore, being badly in need of a kind of small-sized movable CT scanner for critical patient provides in good time bed other scan service, with the danger of the diagnosis that avoids delay.

There are some Mobile CT instrument products at present, but have employed the technology approximate with traditional CT bar none, as scintillator detector array, the working method of the transmission of slip ring data and helical scanning, and can only cross sectional reconstruction be carried out, be all that x-ray source and detector are fixedly installed on rotating disk, in turntable rotation process, detector receives the X-ray after being perforated through human organ or tissue, carries out 3-dimensional reconstruction by computer software to the data gathered.And in order to embody convenience further, adapt to the demand of future market, the diagnostic function of the other CT scanner of bed should do corresponding expansion, and as DR film making, x perspective, doctor can detect position according to patient, rational test mode is selected in the requirement of inspection fee and image resolution ratio.

Moreover there is many places that can improve in motion scan instrument.For CereTom, it has mainly carried out miniaturization improvement to scanner volume and weight, and its scan pattern still continues to use the conventional art of large-scale CT scanner, causes scanned object to accept more radiation dose.Meanwhile, also there is larger surrounding dosage in it, relatively adds the other environmental risk checked of bed.In addition, the scan aperture of CereTom only has 30cm, and space is less, and the compatibility being difficult to important physiology monitoring and crash equipment with some uses.It is mobile that it also adopts crawler belt to realize scanning, and not only require very high to the ground of work place, the movement of scanning process mid frame also may have an impact to the real-time monitoring of patient.

It is light that the other CT scanner of bed has quality, volume is little, move the features such as flexible, but existing market is gone to bed, other CT scanner medical diagnosis function ratio is more single, CT scan detection can only be carried out to patient, do not possess DR film making function, client need is made to toss about in bed multiple sensing chamber to complete required Detection Information, inconvenience is brought to patient, particularly to the critically ill patient of not easily movement, a kind of multi-functional CT scanner is needed conveniently to carry out multinomial detection, simultaneously, existing CT scanner at least needs revolving scanning 360 degree of valid data can rebuild the multiple faultage image of acquisition, its power supply and communication mode are according to carbon brush and low pressure the slip ring then too high and function waste of cost, if separately at the synchronous pulley end face configuration rotary type drag chain of disk scanner dorsal part, then can greatly increase disk scanner width, seem that complete machine is too fat to move.Though other too complicated wire laying modes can meet powered communication requirement, but exist cable at random, pull, the potential safety hazard such as distortion, actual effect is undesirable.

Utility model content

An object of the present utility model solves at least the problems referred to above, and provide the advantage will illustrated at least below.

What this utility model mainly solved is that CT scanner requires very high technical problem to the ground of work place, mainly through reducing the volume of CT scanner, weight, the rotation radian of minimizing rotatable parts and the vibration amplitude of complete machine, eliminated the measures such as transmission eccentric force to alleviate and the shock momentum of eliminating CT scanner self reduces requirement to work ground by balance correction simultaneously, carry out the movement of assisted CT instrument further by the mobile device with middle control brake mechanism and fix, making the using area of CT scanner wider.

In order to realize according to these objects of the present utility model and other advantage, provide the other CT scanner of a kind of small-sized bed, comprising:

Frame, its vertical rack is located on the mobile device of CT scanner; Rotary part, it is rotated by floating bearing and is arranged in described frame, and described rotary part and frame are circular ring, and circle ring center is as the scanning holes of CT scanner; Imaging system, it has and is arranged on described rotary part with the x-ray source assembly on sidewall and detector assembly along axle centrosymmetry, described x-ray source assembly is connected with turning cylinder with described rotary part, and described detector assembly is can the mode correspondence of translation receive from the emergent ray of described x-ray source assembly; And drag chain parts, it is crossed on described frame side wall, across the semi-perimeter establishing length to be no more than described frame, one end of described drag chain parts is fixed in described frame, the other end is movably arranged on the sidewall of described frame with described rotary part, and cable connects power supply and described imaging system by described drag chain parts; Wherein, described x-ray source assembly is using taper half fan-beam as outgoing beam, described x-ray source assembly rotates to an angle, the synchronous translation of described detector to the position receiving described outgoing beam completely, simultaneously described imaging system has rotated a circle to object with dynamic volume scan mode scanning imagery process.

Preferably, the outer ring of described floating bearing is arranged on the inner ring of described frame, and spacing with the outer ring pressing plate be arranged on another sidewall of described frame by the boss on described frame one sidewall, described floating bearing adopts can bear larger axis and the crossed roller bearing of radial load simultaneously; Described rotary part has rotating disk, ring flange and synchronous pulley, described rotating disk and ring flange are by being connected back to the mode of bolt clamping floating bearing inner ring, described synchronous pulley is connected with screw with ring flange lateral wall, and described synchronous pulley is connected with Timing Belt with the belt wheel be arranged on immediately below described frame.

Preferably, described x-ray source assembly comprises: base, and its medial wall is arranged on the lateral wall of described rotating disk; X-ray source generator, one end of its medial wall is arranged on by block bearing on the lateral wall of described base, and the beam exit window of described x-ray source assembly is arranged on the upper surface of described x-ray source generator; First single shaft driver element, it is fixedly mounted on the lateral wall of described base, and described first single shaft driver element comprises the first slide rail, is arranged on the first slide block on the first slide rail and drives the first drive motors of described first slide block movement; And first connecting rod assembly, its one end is rotatably connected on described first slide block, and the other end of described link assembly is rotatably connected on the other end of described x-ray source generator medial wall; Wherein, described x-ray source generator medial wall is provided with x-ray source bearing, its one end is provided with stepped hole, itself and described pedestal bearing outer race axle are connected, described base one end is provided with outstanding Step Shaft, itself and described block bearing inner ring hole are connected, and described block bearing adopts crossed roller bearing.

Preferably, described detector assembly comprises: the first pedestal, and its medial wall is arranged on described base on obverse described rotating disk lateral wall; Second single shaft driver element, it is fixedly mounted on described first pedestal, and described second single shaft driver element comprises the second slide rail, is arranged on the second slide block on the second slide rail and drives the second drive motors of described second slide block movement; Detector bearing, its upper end is fixedly connected with described second slide block; Flat panel detector, it is horizontally installed on described detector bearing, and the test surface of described flat panel detector is relative with described exit window, and described flat panel detector is vertical with the radial direction of described rotating disk all the time; Wherein, described base and pedestal are 180 ° and are relatively fixedly installed on described rotating disk, and the vertical dimension between described base and the second pedestal is not less than the diameter of described rotating disk endoporus.

Preferably, described drag chain parts comprise: drag chain, and its fixed end is placed in the positive upper end of described frame, and described drag chain moved end is movably arranged on described frame side wall; Outer ring guiding pallet, it is installed in described frame, and is in the coaxial peripheral space of described synchronous pulley; Inner ring prerotation vane, itself and the described outer ring pallet that leads is affixed, and is coaxially arranged on the region between described outer ring guiding pallet and described synchronous pulley, and described drag chain moved end is movably arranged in the annular space that described outer ring guiding pallet and described synchronous pulley determine; And follower, it comprises follower roller and connected servo-actuated bent plate, and described follower roller is movably arranged in the space between described ring flange and frame, and described servo-actuated bent plate is crossed on described rotary part surface, and is fastenedly connected with described drag chain moved end; Wherein, described drag chain adopts compound bending drag chain, and described outer ring guiding pallet is connected to the peripheral space of synchronous pulley in frame by sunk screw, the end surface thickness of described outer ring guiding pallet and inner ring prerotation vane does not exceed the end surface thickness of synchronous pulley.

Preferably, described ring flange circumferentially edge has annular guide channel, guide groove angular range is 150 °, guide groove upper surface is fixedly installed annular pressing plate with screw, the concave profile of guide groove, annular pressing plate and frame that ring flange is offered forms the geometric space that can retrain follower roller, follower roller axis and scanning holes axis being parallel; Within the scope of described rotary part rotates first 150 °, drag chain moved end, follower roller and servo-actuated bent plate keep absolute rest, follower roller and guide groove Structure deformation, the space free traction in scanning holes of period cable free segment, rear 230 ° of scope inner flanges pull servo-actuated bent plate to do circulatory motion together with drag chain moved end by follower roller, altogether complete 380 ° of angles of revolution.

Preferably, described outer ring guiding pallet be arranged on described frame side wall ± angular range of 115 ° in, the positive lower ending opening of described outer ring guiding pallet, described Timing Belt connects described belt wheel and synchronous pulley through described opening, described inner ring prerotation vane is arranged on-115 ° ~ 0 ° position in region between described outer ring guiding pallet and described synchronous pulley, under CT scanner leaves standstill default conditions, drag chain moved end is positioned at-115 ° of positions, along with the rotation of described rotatable parts, drag chain moved end moves back and forth in the angular range of ± 115 °; Wherein, in 0 ~ 115 ° of interval, the arc space that described outer ring guiding pallet and synchronous pulley are formed is allowed that drag chain is folding and is passed through, and in 0 ~-115 ° of interval, the arc space that described inner ring prerotation vane and synchronous pulley are formed allows that drag chain monolayer passes through.

Preferably, described mobile device comprises: the second pedestal, and it is rectangle platy structure, and four of described pedestal end lower ends, angle are respectively arranged with medical bedstead wheel, described second two ends, base length direction respectively on be provided with go-cart handrail; Middle control brake assemblies, it is arranged on the upper end of described handrail, and can stretch up and down along described handrail; And kinematic link assembly, it is arranged on the lower end of mobile device, and described kinematic link component synchronization connects the control for brake end of four described medical bedstead wheels, and the telescopic end of described middle control brake assemblies is connected by the movable end of brake cable with described kinematic link assembly; Wherein, described second pedestal is movably set with lifting assembly, and CT scanner is arranged on described lifting assembly.

Preferably, the exit window of described x-ray source generator is provided with the beam-defining clipper for limiting beam shape, the visual field indicating mechanism for the reading scan visual field is provided with in described beam-defining clipper, described visual field indicating structure comprises LED light source, beam-defining jaw and transmitting mirror, and the focus of described LED light source becomes mirror image relationship with x-ray source bulb focus relative to described reflecting mirror.

Preferably, the described rotating disk of described detector assembly correspondence position is provided with several balancing weights, described configuration block is used for carrying out balancing to the revolution centrifugal force of described rotary part.

This utility model at least comprises following beneficial effect:

1, adopt half fan-beam tilt detector scan pattern, this scan pattern will significantly reduce the detector cost of scanner, reduce the requirement to x-ray source segment angle simultaneously, expand existing radiogenic selection.Under the prerequisite of equal scan vision, the flat panel detector tilting to install increases the distance of detector to center of rotation, thus actually increases the internal diameter of scanner, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument;

2, have DR film making, CT scan and perspective function concurrently, this function makes this other CT scanner a machine three-use by custom-designed scan pattern mapping device, improves service efficiency, meets the user demand under different condition;

3, adopt the drag chain structure of unique design, significantly reduce complete machine weight and volume;

4, adopt the middle control brake mechanism that two ends are controlled, improve mobility, shorten instrument location and put time;

5, adopt the visible ray reading scan visual field, compare traditional laser cross-line, simplify the pendulum position process of patient before cone-beam CT scan;

6, CT scanner of the present utility model has super large scan aperture, is particularly useful for, with the critical patient of the ancillary equipment such as multiple vital sign maintenance equipment, expanding the scope of application.

7, this utility model provides the other CT scanner of a kind of small-sized bed, extend the using function of the other CT scanner of bed, improve the convenience of the other CT scanner of bed, doctor can detect position according to patient, the requirement of inspection fee and image resolution ratio selects rational test mode;

8, CT scan function adopts offset flat-panel detector to add the half fan-delta sandbody mode in inclined X-rays source, increase effectively scan vision and scan aperture, and reduces the requirement to x-ray source segment angle;

9, DR film making function then adopts x-ray source and the vertical positive control of flat panel detector to penetrate projection pattern, checks fast affected site with low radiation dose;

10, this utility model provide CT scan, DR film making function switching mechanism allow CT scan visual field continuously adjustabe, and debug easily, control simple, positioning and locking is reliable, ensure that scanning accuracy;

11, CT scanner of the present utility model provides tomography and perspective two kinds of imaging modes, conveniently moving, can use at emergency room, ICU and public ward, can be used for vehicle-mounted, carrier-borne and airborne, meet critical illness first aid and field trauma gives treatment to needs fast, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument;

12, by the connecton layout in this utility model, on the basis not increasing structural complexity, not only complete the powered communication demand within the scope of 380 degree smoothly, and avoid occurring cable winds, pull, the problem such as loose, effectively reduce the axial width of disk scanner simultaneously, make complete machine compacter;

13, this Cone-Beam CT revolving scanning connecton layout structure is simple, cable pulling is smooth and easy, safe and reliable, and effectively reduce the axial width of disk scanner, complete machine is made to seem compacter, small and exquisite, avoid separately at disk scanner side configuration rotary type drag chain in prior art, the drawback cause increase disk scanner width, making complete machine too fat to move;

14, the connecton layout in this utility model, drag chain moved end only needs positive negative rotation 115 °, the interlude of cable only needs left-right rotation 75 ° can complete powered communication demand within the scope of whole 380 degree, substantially reduce the range of activity of drag chain and cable, namely effectively reduce cable and drag chain to the interference of rotary motion, improve the reliability of CT scanner work; And though other too complicated wire laying modes can meet powered communication requirement in prior art, but exist cable at random, pull, the potential safety hazard such as distortion, actual effect is undesirable;

15, the CT scanner revolving scanning 360 degree of valid data of the connecton layout in this utility model can be rebuild and obtain multiple faultage image, avoid power supply and communication mode in prior art to adopt carbon brush and low pressure slip ring and the too high and drawback of function waste of the cost that causes;

16, in this utility model connecton layout, be provided with position-limit mechanism in the front and back of rotary part, under the prerequisite that the mechanical position limitation completing position, start, end in 380 degree of revolution range requires, available protecting cable damages from the unexpected excess of stroke simultaneously.

17, mobile device is servo-actuated with drawing, and pull rod shaft one resets, the mobile device that mobile device can fix on the ground, greatly facilitates staff and CT scanner is moved, shake little, after position is fixing, mobile device can fix on the ground inflexibly, not easily moves, thus turn improve imaging or the film making performance of CT scanner, definition is higher, and as can be seen here, mobile device of the present utility model has larger good Practical Performance and operability;

18, mobile device of the present utility model can realize one man operation, and push-and-pull is convenient, simultaneously without the need to removing each castor of Non-follow control, goes manually to check each castor behind in-position again, mobile facilitation more, and operability is higher, mobile more convenient;

19, after mobile device location is complete, the lifting of CT scanner can be controlled easily, adjust to suitable height, be convenient to imaging or film making, improve work efficiency, reduce the movement of patient, avoid causing secondary injury, after adjusting to proper height, CT scanner can keep stable, reduce vibrations and rock, improving imaging or shooting quality further;

20, by tilting scanning cone-beam, thus make detector larger to the distance of center of rotation, add the sweep radius of scanning cone-beam, and keep central visual field size constant, that is sweep radius in proportion, relative to prior art, this utility model can reduce the diameter of rotating mechanism, namely reduces the volume and weight of CT scanner.

Part is embodied by explanation below by other advantage of the present utility model, target and feature, part also will by research and practice of the present utility model by those skilled in the art is understood.

Accompanying drawing explanation

Fig. 1 is imaging system schematic three dimensional views of the present utility model;

Fig. 2 be in this utility model CT revolving scanning connecton layout through the top cross-sectional view of rotary middle spindle;

The CT revolving scanning connecton layout partial section that Fig. 3 provides for this utility model embodiment;

Fig. 4 is the three dimensional structure schematic diagram of described rotatable parts;

Fig. 5 is the assembly structure schematic diagram of described imaging system;

Fig. 6 is the structural representation of described servo-actuated bent plate;

Fig. 7 is the mounting structure schematic diagram of described synchronous pulley and belt wheel;

Fig. 8 is imaging system mechanical limit structure partial view of the present utility model;

Fig. 9 is the structural representation of described ring flange;

Figure 10 be this utility model CT scanner face structural representation;

Figure 11 is the perspective view of this utility model CT scanner;

Figure 12 is this utility model x-ray source modular construction schematic diagram;

Figure 13 is this utility model detector assembly structural representation;

Figure 14 is the structural representation of mobile device.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail, can implements according to this with reference to description word to make those skilled in the art.

Should be appreciated that used hereinly such as " to have ", other element one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.

As represented in figures 1 through 14, this utility model provides a kind of medical small-sized bed other CT scanner, and comprising: frame 1, its lower end, both sides is located on the mobile device of CT scanner by bracket 14 vertical rack; Rotary part, it has rotating disk 3, ring flange 4 and synchronous pulley 5, described rotating disk 3 and ring flange 4 are by being connected back to the mode of bolt clamping floating bearing 9 inner ring, thus unitary rotation can be realized by floating bearing 9, described synchronous pulley 5 is connected with screw with ring flange 4 lateral wall, and described synchronous pulley 5 is connected with belt wheel 17; Belt wheel 17 drives synchronous pulley 5 to rotate, and then drives the ring flange 4 be connected with synchronous pulley 5 and the rotating disk be connected with ring flange 43 to realize rotating in frame 1 by floating bearing 9; Imaging system, it has and is arranged on described rotary part with the x-ray source assembly on sidewall and detector assembly along axle centrosymmetry, described x-ray source assembly is connected with turning cylinder with described rotary part, and described detector assembly is can the mode correspondence of translation receive from the emergent ray of described x-ray source assembly; And drag chain parts, it is crossed on described frame side wall, across the semi-perimeter establishing length to be no more than described frame, one end of described drag chain parts is fixed in described frame, the other end is movably arranged on the sidewall of described frame with described rotary part, and cable connects power supply and described imaging system by described drag chain parts; Drag chain, its fixed end is placed in the positive upper end of described frame, and described drag chain moved end is movably arranged on described frame side wall; Outer ring guiding pallet, it is installed in described frame, and is in the coaxial peripheral space of described synchronous pulley; Inner ring prerotation vane, itself and the described outer ring pallet that leads is affixed, and is coaxially arranged on the region between described outer ring guiding pallet and described synchronous pulley, and described drag chain moved end is movably arranged in the annular space that described outer ring guiding pallet and described synchronous pulley determine; And follower, it comprises follower roller and connected servo-actuated bent plate, and described follower roller is movably arranged in the space between described ring flange and frame, and described servo-actuated bent plate is crossed on described rotary part surface, and is fastenedly connected with described drag chain moved end; Wherein, described drag chain adopts compound bending drag chain, and described outer ring guiding pallet is connected to the peripheral space of synchronous pulley in frame by sunk screw, the end surface thickness of described outer ring guiding pallet and inner ring prerotation vane does not exceed the end surface thickness of synchronous pulley.Drag chain 22, its fixed end 21 is placed in the positive upper end of described frame 1, described drag chain moved end 23 is movably arranged on described frame 1 sidewall, and specifically, drag chain 22 is around being arranged on the sidewall of frame 1, fixed end 21 is fixed, moved end 23 is along with the rotation of rotary part, movable around fixed end about 21, coordinates rotary part to complete the rotation of whole 380 °, for electricity consumption communication component is powered, to complete scanning and the film making function of CT scanner; And follower 7, it comprises follower roller 71 and connected servo-actuated bent plate 72, described servo-actuated bent plate 72 is crossed on described rotary part surface, and the axis of follower roller 72 is parallel with the axis of rotary part, and careless bent plate 72 is fastenedly connected with described drag chain moved end 23; Headspace is provided with between the outer ring of described ring flange 4 and frame 1 inner ring, the institute that described follower roller 71 is movably arranged on seems in headspace, along with first 150 ° of the rotation of rotatable parts, follower roller 71 rotates and rotates in headspace, and position is not moved, rear 230 ° then along with rotatable parts rotate together; Described frame 1, floating bearing 9 and described rotary part are the coaxial circular ring arranged, circle ring center is as the scanning holes of CT scanner, cable one end is connected with the imaging system of CT scanner, and is connected with power supply after rotating disk lateral wall, scanning holes inner ring, follower 7, drag chain moved end 23, drag chain inside, drag chain fixed end 21 and frame 1 successively.Wherein, described x-ray source assembly is using taper half fan-beam as outgoing beam, described x-ray source assembly rotates to an angle, the synchronous translation of described detector to the position receiving described outgoing beam completely, simultaneously described imaging system has rotated a circle to object with dynamic volume scan mode scanning imagery process.

Be 0 ° of direction with drag chain top 21, use the CT scanner of connecton layout of the present utility model only need rotate 380 ° and can complete whole scanning process and film making process, wherein, the acceleration and deceleration of each 10 ° are interval, valid interval is 360 °, and in prior art, the scan mode of the spiral or sliding ring type of most employing, screw type scan mode needs multi-turn rotation just can complete whole scanning and film making process, need long connection wire, easily cause upsetting of connection cord simultaneously, affect the functional reliability of CT scanner, for this reason, Cone-Beam CT is adopted in this utility model, generally under Timing Belt drives, only need revolving scanning 360 degree of valid data to rebuild and obtain multiple faultage image, but in prior art, this Cone-Beam CT is powered and is adopted carbon brush and low pressure slip ring with communication mode, cause cost too high and function waste, if separately at the synchronous pulley end face configuration rotary type drag chain of disk scanner dorsal part, then can greatly increase disk scanner width, seem that complete machine is too fat to move.Connecton layout of the present utility model well solves this problem, under the prerequisite that rotary part only need complete 380 °, drag chain moved end 23 only need complete 230 ° in frame 1, thus the interval vacating 130 ° in frame 1 lower end supplies the connection of synchronous pulley and belt wheel, add under the prerequisite that drag chain moved end 23 is motionless, rotary part 150 ° of freely rotating, thus complete the complete scan of 380 °, and then achieve drag chain can with synchronous pulley, belt wheel is in same plane, namely the thickness of CT scanner is reduced, meeting under powered communication requirement, enormously simplify wire laying mode, solve in prior art that to there is cable at random, pull, the potential safety hazards such as distortion, the technical problems such as actual effect is undesirable.

In technique scheme, the outer ring of described floating bearing 9 is arranged on the inner ring of described frame 1, and by the boss on described frame 1 one sidewall and the outer ring pressing plate 31 be arranged on another sidewall of described frame, floating bearing 9 is carried out spacing, described floating bearing 9 adopts can bear larger axis and the crossed roller bearing of radial load simultaneously, improves the rotation reliability of floating bearing 9.

In another kind of embodiment, the outer ring of described rotating disk 3 and ring flange 4 is folded on the inner ring of described floating bearing 9, thus rotating disk 3 and ring flange 4 are fixed, and can be rotated in frame 1 by floating bearing 9, described rotating disk 3 lateral wall is provided with imaging x-ray source generator 13 and detector 16, also be imaging system, x-ray source generator 13 is arranged on the positive upper end of frame, detector 16 is arranged on the positive lower end of frame, described belt wheel 17 is arranged on immediately below described frame 1, described belt wheel 17 is connected with described synchronous pulley 5 with Timing Belt, synchronous pulley is connected with ring flange, thus achieve the connection of belt wheel 17 and whole rotary part, control belt wheel can control rotary part and rotate back and forth 380 ° in frame 1.

In another kind of embodiment, annular cavity is provided with between described rotating disk 3 and ring flange 4 inner ring, described cable interlude, namely free segment 6 is arranged in described annular cavity and its two ends connection imaging system and drag chain moved end, other parts of cable withstand in frame admittedly, or it is inner to be fixed on drag chain 22, along with drag chain moves together, so cable free movable part can only have cable free segment 6, its length is probably 75 ° of scopes bottom annular cavity, when rotary part starts to rotate first 150 °, cable free segment 6 moves back and forth 75 ° around drag chain moved end 23 in annular cavity, thus complete the span of whole 150 °, the rotary course of 230 ° afterwards, cable free segment 6 position in annular cavity is fixed, that is, in the rotary course of whole 380 °, freely movable cable length only has the span of 75 °, length reduces greatly, namely avoid the at random of cable, pull, the potential safety hazards such as distortion, reduce the use line length of cable simultaneously, cost-saving.

In another kind of embodiment, the lateral wall of described ring flange 4 circumferentially has annular guide channel 41 in edge, guide groove angular range is 150 °, guide groove upper surface is fixedly installed annular pressing plate 42 with screw, the concave profile of guide groove 41, annular pressing plate 42 and frame 1 that ring flange 4 is offered forms the geometric space that can retrain follower roller 71, follower roller 71 axis and scanning holes axis being parallel, follower roller 71 selects the Cam Follower of the polyurethane roller reducing noise, during beginning, rotary part resets to the position that guide groove is just in time in the positive lower end of frame, guide groove is symmetrical set, within the scope of described rotary part rotates first 150 °, drag chain moved end 23, follower roller 71 and servo-actuated bent plate 72 keep absolute rest, follower roller 71 and guide groove 41 Structure deformation, that is ring flange is by the rotation of follower roller first 150 ° of scrolling realization on frame medial wall, the space free traction in scanning holes of period cable free segment 6, that is to say the rotation completing 75 ° back and forth around drag chain moved end 23, within the scope of latter 230 degree, because follower roller 71 one end in guide groove 41 moves to the other end, in the present embodiment, rotatable parts rotate counterclockwise, follower roller moves to low order end from high order end, follower roller cannot roll again, now, along with being rotated further of rotatable parts, ring flange 4 pulls servo-actuated bent plate 72 to do circulatory motion together with drag chain moved end 23 by follower roller 71, namely rear 230 ° of follower roller also do not rotate, rotatable parts complete 380 degree of angles of revolution altogether, cable free segment rotates each 75 ° back and forth in annular cavity, 150 ° altogether, period drag chain moved end 23, follower roller 71 and servo-actuated bent plate 72 keep static, follower roller rotates 150 ° in guide groove 41, rotary part rotate latter 230 °, drag chain moved end 23, follower roller 71 and servo-actuated bent plate 72 carry out back rotation 115 ° around drag chain fixed end 21, 230 ° altogether, period, follower roller do not rotate, but taken to together by the low order end of guide groove 41, and then drive servo-actuated bent plate 72 to rotate together with drag chain moved end 23.

In another kind of embodiment, connecton layout of the present utility model also comprises drag chain accessory module 2, it has outer ring guiding pallet 24 and inner ring prerotation vane 25, described outer ring guiding pallet 24 is installed in described frame, and be in the coaxial peripheral space of described synchronous pulley, described inner ring prerotation vane 25 and the described outer ring pallet 24 that leads is affixed, and the region be coaxially arranged between described outer ring guiding pallet and described synchronous pulley, described drag chain moved end 23 is movably arranged in described outer ring guiding pallet and the annular space determined of described synchronous pulley.Described drag chain 22 adopts compound bending drag chain, and described outer ring guiding pallet 24 is connected to the peripheral space of synchronous pulley 5 in frame 1 by sunk screw, the end surface thickness of described outer ring guiding pallet and inner ring prerotation vane does not exceed the end surface thickness of synchronous pulley.

Concrete described outer ring guiding pallet 24 be arranged on described frame side wall ± angular range of 115 ° in, the positive lower ending opening of described outer ring guiding pallet 24, namely be set to opening in outer ring guiding 115 ° ~ 180 ° of pallet 24 and-115 ° ~-180 ° intervals, and outer ring guiding pallet 24, inner ring prerotation vane 25, Timing Belt and synchronous pulley are in same plane, described Timing Belt connects described belt wheel and synchronous pulley through described opening, described inner ring prerotation vane 25 is arranged on-115 ° ~ 0 ° position in region between described outer ring guiding pallet 24 and described synchronous pulley 5, by two-layer for its middle region separation, under CT scanner leaves standstill default conditions, before namely scanning computed tomography scanner scanning starts, rotatable parts reset, drag chain fixed end 21 is positioned at directly over frame 1, drag chain moved end 23 is positioned at-115 ° of positions, drag chain 22 naturally stretches and is crossed in 0 ~ 115 ° of interval, drag chain moved end 23 is folding upwards, belt wheel driven rotary parts rotate, along with the rotation of described rotatable parts, drag chain moved end 23 moves back and forth in the angular range of ± 115 °, wherein, front 150 ° of intervals that rotary part rotates, cable free segment 6 moves back and forth 75 °, cable free segment 6 rotates each 75 ° back and forth in annular cavity, 150 ° altogether, period drag chain moved end 23, follower roller 71 and servo-actuated bent plate 72 keep static, follower roller rotates 150 ° in guide groove 41, rotary part rotate latter 230 °, drag chain moved end 23, follower roller 71 and servo-actuated bent plate 72 carry out back rotation 115 ° around drag chain fixed end 21, 230 ° altogether, period, follower roller do not rotate, but driven together by the low order end of guide groove 41, and then drive servo-actuated bent plate 72 to rotate together with drag chain moved end 23, drag chain moved end 23 is in frame 0 ~ 115 ° of interval, the arc space that described outer ring guiding pallet and synchronous pulley are formed is allowed that drag chain 22 is folding and is passed through, namely drag chain moved end 23 counterclockwise upwards upwards folding movement in frame, in 0 ~-115 ° of interval of frame, with the arc space that synchronous pulley is formed, described inner ring prerotation vane 24 allows that drag chain 22 monolayer passes through, the namely counterclockwise upwards downward single-layer motion in frame in drag chain moved end 23, the namely lower floor of m-115 ° ~ 0 ° of regional location of described outer ring guiding pallet 24 and described synchronous pulley 5, prevent drag chain from giving a discount in reseting procedure, block drag chain, and then hinder the reset of rotary part.After rotary part rotates 380 °, namely CT scanner workflow terminates, and rotary part rotates backward and resets, and reseting procedure is with to be rotated counterclockwise process contrary.

In another embodiment, described servo-actuated bent plate 72 is rustless steel sheet metal component, in approximate " W " shape, side 721 strides across in synchronous pulley 5 pilot cable to described annular cavity, opposite side 722 strides across outer ring guiding pallet 24 and the outstanding structure 7221 be provided with as lead limit switch 8 contact, lead limit switch 8 is arranged on frame-115 ° and 115 ° of positions, and between the Rotary District of restriction follower, described follower roller 71 and drag chain moved end 23 are all connected to 723 places in the middle part of servo-actuated bent plate 72.

In another embodiment, described frame is provided with arc-shaped guide rail 11 and mounted thereto slides link stopper 12 on the outer wall of described rotating disk side, the angle range of arc-shaped guide rail 11 is 22 degree, and arrange in the interval of 93 ° ~ 115 °, on described rotating disk, correspondence is provided with mechanical position limitation bar 10, during initial position, slide link stopper 12 115 ° of positions, and mechanical position limitation bar 10 is in the upper surface position of sliding link stopper 12, along with the rotation of rotary part, mechanical position limitation bar 10 is along with dial rotation 360 °, withstand afterwards and slide block 12 be rotated further 20 ° on arc-shaped guide rail 11, thus described slide the backstop of block under coordinate rotary part to complete in 380 degree of revolution range to rise, the mechanical position limitation in final position, spacing to the reinforcement of lead limit switch 8, guarantee CT scanner runs well.

From the above mentioned, rotary part comprises rotating disk 3, ring flange 4 and synchronous pulley 5, and the image-forming assembly be arranged on rotating disk 3, floating bearing 9 outer ring is arranged in frame 1, rotating disk 3 and ring flange 4 are by realizing being connected back to the mode of bolt clamping floating bearing 9 inner ring, synchronous pulley 5 and ring flange 4 coaxial cooperation, connect with screw.Preferably, floating bearing 9 adopts crossed roller bearing, can bear larger axis and radial load simultaneously, is comparatively small machine weight, rotating disk 3, ring flange 4 and synchronous pulley 5 material aluminium alloy.Ring flange 4 circumferentially edge has annular guide channel, angular range is 150 degree, guide groove upper surface is with screw stationary annular pressing plate, the concave profile of guide groove, annular pressing plate and the frame 1 that ring flange 4 is offered forms the geometric space that can retrain follower roller 71, follower roller 71 axis and scanning holes axis being parallel, preferably, follower roller 71 selects the Cam Follower of polyurethane roller, to reduce noise.Preferably, drag chain 22 adopts compound bending drag chain, outer ring guiding pallet 24 material adopts stainless steel part, the peripheral space of synchronous pulley 5 in frame 1 is connected to by sunk screw, outer ring spigot surface height does not exceed the end face of synchronous pulley, and the arc space that itself and synchronous pulley are formed is allowed that drag chain 22 is folding and passed through.Inner ring prerotation vane 25 adopts stainless steel part equally, and be connected by screw or welding manner and the outer ring pallet 24 that leads, the arc space that itself and synchronous pulley are formed allows that drag chain 22 monolayer passes through.

Under machine leaves standstill default conditions, drag chain fixed end 21 is positioned at directly over frame 1, and drag chain moved end 23 is positioned at-115 degree positions, and itself and follower roller 71 are all connected on servo-actuated bent plate 72.Servo-actuated bent plate 72 is rustless steel sheet metal component, and in approximate " W " shape, side strides across synchronous pulley 5 pilot cable in scanning holes, and opposite side strides across outer ring guiding pallet 24 and gives prominence to the contact of structure as lead limit switch 8.Cable from imaging system end to the cabling of power supply order be: rotating disk-scanning holes-free segment-scanning holes-movable head-drag chain moved end-drag chain inside-drag chain fixed end-frame-power supply.

Rotate within the scope of first 150 degree, drag chain moved end 23, follower roller 71 keep absolute rest with servo-actuated bent plate 72, follower roller 71 and guide groove Structure deformation, the space free traction in scanning holes of period cable free segment 6, rear 230 degree of scope inner flanges 4 pull servo-actuated bent plate 72 to do circulatory motion together with drag chain moved end 23 by follower roller 71, altogether complete 380 degree of angles of revolution.Arc-shaped guide rail and slide block unit and adopt ball sliding pair, slides block both sides and should paste damping material, to cushion the percussion of itself and mechanical position limitation bar.By the connecton layout of the present embodiment, on the basis not increasing structural complexity, not only complete the powered communication demand within the scope of 380 degree smoothly, and avoid occurring cable winds, pull, the problem such as loose, effectively reduce the axial width of disk scanner simultaneously, make complete machine compacter.

The other cone-beam CT scanner of bed on market is powered with communication mode according to carbon brush and low pressure the slip ring then too high and function waste of cost, if separately at the synchronous pulley end face configuration rotary type drag chain of disk scanner dorsal part, then can greatly increase disk scanner width, seem that complete machine is too fat to move.Though other too complicated wire laying modes can meet powered communication requirement, but exist cable at random, pull, the potential safety hazard such as distortion, actual effect is undesirable.

In order to solve above-mentioned the deficiencies in the prior art, this utility model provides the connecton layout being applicable to cable in Cone-Beam CT revolving scanning process, its compact conformation, and cable pulling is smooth and easy, safe and reliable.

Rotating disk is connected with the rotary driving part be arranged in CT scanner, in the present embodiment, described rotating disk is arranged in frame, and freely can rotate in frame, frame both sides are arranged on the mobile device of described CT scanner by bracket, frame lower end is provided with synchronous pulley simultaneously, synchronous pulley is connected with rotating disk by Timing Belt, thus synchronous pulley drives rotating disk to realize forward and reverse in frame, complete CT scan process, x-ray source assembly, its lateral wall being arranged on described rotating disk can be rotated on described rotating disk, the outgoing beam of described x-ray source group is towards the axle center of described rotating disk, concrete, x-ray source assembly one end is rotatably connected on the lateral wall of rotating disk by turning cylinder, the other end being promoted x-ray source assembly by driving mechanism is rotated on the lateral wall of rotating disk around the turning cylinder of the other end, thus the shooting angle of X-ray can be adjusted, simultaneously, the radiation exit place of x-ray source assembly is provided with beam-defining clipper, and detector assembly, it is arranged on described x-ray source assembly on obverse described rotating disk lateral wall, for receive from the outgoing of x-ray source assembly through patient body X-ray, thus extraction effective information, CT scan function of the present utility model adopts offset flat-panel detector to add the half fan-delta sandbody mode in inclined X-rays source, by the angle of adjustment x-ray source assembly emergent ray, the detector assembly of translation simultaneously makes it keep receiving the emergent ray of x-ray source assembly, for CT scan imaging, first aspect, DR film making function adopts x-ray source and the vertical positive control of flat panel detector to penetrate projection pattern, when DR film making will be carried out, as long as x-ray source assembly to be reset to the vertical position of flat panel detector, that is CT scanner of the present utility model provides 2 kinds of working methods, a kind of is the half fan-delta sandbody mode adopting offset flat-panel detector to add inclined X-rays source, complete CT scan, another kind is, x-ray source and the vertical positive control of flat panel detector penetrate projection pattern, complete DR film making and perspective function, CT scanner can freely switch easily in these two kinds of working methods, the rotation of x-ray source assembly and flat panel detector translation are interlocks, thus achieve combine several functions on same machine.Wherein, the detector in described detector assembly is vertical with described rotating disk lateral wall and can with the rotation of described x-ray source assembly translation on described rotating disk 1, ensures that detector can receive the exit Xray of x-ray source assembly all the time.

In prior art, X-ray emission source and detector are arranged in the circular inner sidewall of rotating disk by general CT scanner, and detector is all scintillator detector array, with the transmission of slip ring data and the working method of helical scanning, and can only cross sectional reconstruction be carried out, be all that x-ray source and detector are fixedly installed on rotating disk, in turntable rotation process, detector receives the X-ray after being perforated through human organ or tissue, carries out 3-dimensional reconstruction by computer software to the data gathered.This detector and X-ray emission source limit the range of application of CT scanner, CT scan can only be used for, and in this utility model, adopt plate detector, the focal plane of adding x-ray source is more of the prior art less, pixel is higher, imaging is more clear, thus when x-ray source and the vertical positive control of flat panel detector, DR film making and perspective function can be realized, simultaneously, the half fan-delta sandbody mode adopting offset flat-panel detector to add inclined X-rays source can complete CT scan process, the x-ray source tilting to install is adopted to increase the distance of detector to x-ray source center of rotation, thus in fact increase scanning internal diameter, scanner scanning can complete whole three-dimensional reconstruction process for one week, and sweep limits is larger, thus the x-ray radiation reduced patient, further can on the basis keeping original scanner size, increase the scanning holes internal diameter of scanner, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument.

In a kind of embodiment, described x-ray source assembly comprises: base 221, and the laminating of its medial wall is arranged on the lateral wall of described rotating disk, base 221 can be the steel plate of punching, is bolted on rotating disk, x-ray source generator 222, one end of its medial wall is arranged on by block bearing 224 on the lateral wall of described base 221, and the beam exit window of described x-ray source assembly is arranged on the upper surface of described x-ray source generator 222, first single shaft driver element 227, it is fixedly mounted on the lateral wall of described base 221, and described first single shaft driver element 227 comprises the first slide rail, is arranged on the first slide block 226 on the first slide rail and drives the first drive motors 228 of described first slide block movement, and first connecting rod assembly 225, its one end is rotatably connected on described first slide block 226, the other end of described link assembly 225 is rotatably connected on the other end of described x-ray source generator 222 medial wall, thus when the first drive motors 228 drives the first slide block 226 to move on the first slide rail, the lower end of first connecting rod assembly 225 is driven to move, because first connecting rod assembly 225 two ends are all rotationally connected, therefore in the process of movement, first connecting rod assembly rotates simultaneously, x-ray source generator 222 is driven to rotate around block bearing 224, thus the shooting angle of adjustment X-ray.

In another kind of embodiment, described x-ray source generator 222 medial wall is provided with x-ray source bearing 223, its one end is provided with stepped hole, itself and described block bearing 224 outer ring axle are connected, described base 221 one end is provided with outstanding Step Shaft, itself and described block bearing 224 inner ring hole are connected, thus described block bearing 224 is rotationally connected x-ray source bearing 223 and base 221, and described block bearing 224 adopts crossed roller bearing.

In another kind of embodiment, described first connecting rod assembly 225 comprises: first connecting rod 2251; Clutch shaft bearing, it is arranged on one end of described first connecting rod 2251, the first rotating shaft is provided with in described clutch shaft bearing, the other end of described first rotating shaft is fixedly connected on described x-ray source bearing 223 other end, the end face of clutch shaft bearing arranges small end cover, and with small end cover described in screw fastening, limit the axial float of clutch shaft bearing; And second bearing 2252, it is arranged on the other end of described first connecting rod 2251, the second rotating shaft is provided with in described second bearing 2252, the other end of described second rotating shaft is fixedly connected on described first slide block 226, equally, the end face of the second bearing 2252 arranges small end cover 2253, and with small end cover described in screw fastening 2253, be used for the axial float of restriction second bearing 2252.

In another kind of embodiment, described first single shaft driver element 227 is provided with the first proximity transducer 229 for limiting described first slide block 226 movement travel, described first drive motors 228 is provided with band brake apparatus, be used for accurately controlling the stroke of the first slide block 226, and then accurately control the shooting angle of X-ray.

In another kind of embodiment, described detector assembly comprises: the first pedestal 331, and its medial wall is arranged on described base 221 on obverse described rotating disk lateral wall; Second single shaft driver element 334, it is fixedly mounted on described first pedestal 331, described second single shaft driver element comprises the second slide rail, is arranged on the second slide block on the second slide rail and drives the second drive motors 335 of described second slide block movement, and its mechanism is identical with the first single shaft driver element with kinetic characteristic; Detector bearing 333, its upper end is fixedly connected with described second slide block; Flat panel detector 332, it is horizontally installed on described detector bearing 333, and the test surface of described flat panel detector 332 is relative with described exit window, and described flat panel detector 333 is vertical with the radial direction of described rotating disk all the time.Second drive motors 335 drives flat panel detector 332 to realize translation on the first pedestal 331, and the first drive motors and the second drive motors are synchronized with the movement, the ray making flat panel detector 332 receive x-ray source all the time to send.Described second single shaft driver element 334 is provided with the second proximity transducer 336 for limiting described second slide block movement stroke, described second drive motors 335 is provided with band brake apparatus, be used for accurately controlling the stroke of the second slide block, and then accurately control the position of flat panel detector 332.

In another kind of embodiment, described base 221 and the first pedestal 331 are fixedly installed on described rotating disk in 180 degree relatively, vertical dimension between described base 221 and the first pedestal 331 is not less than the diameter of described rotating disk endoporus, ensure scanner scanning aperture to be done greatly under the prerequisite of fine definition as far as possible, meet and detect needs.Described base 221 is located with circular arc concave surface with rotating disk 1, namely the intrados of described base 221 flushes with the intrados of described rotating disk, the extrados of described base flushes with the extrados of described rotating disk, thus restriction secures base 221 position on the turntable 1, the accurate location of base 221 on rotating disk can be facilitated, the shooting angle of X-ray is not impacted;

Simultaneously, described first pedestal 331 offers waist type pin-and-hole, described waist type pin-and-hole is perpendicular to the detection plane of described flat panel detector 332, described first pedestal 331 is bolted on described rotating disk by arranging in described waist type pin-and-hole, only to allow the fine position along rotating disk radial direction, the synchronous calibration of flat panel detector 332 and x-ray source is not impacted.

From the above mentioned, described rotating disk is connected with the parts that frame can produce rotary motion, as bearing, direct driving motor ring flange.Described x-ray source assembly comprises x-ray source, base, block bearing, x-ray source bearing, link assembly, slide block, single shaft driver element, proximity transducer and band band-type brake motor; Described link assembly comprises connecting rod, first, second bearing, small end cover; Described detector assembly comprises flat panel detector, the first pedestal, single shaft driver element, proximity transducer, band band-type brake motor and detector bearing.Above-mentioned x-ray source is finished parts, be fixedly connected with described x-ray source bearing by self mounting structure, described x-ray source bearing settlement has stepped hole, coordinate with described pedestal bearing outer race axle, the Step Shaft that described block bearing inner ring hole and described base are given prominence to is fixedly connected, described block bearing adopts crossed roller bearing, can bear larger radial and axial load.Above-mentioned single shaft driver element is finished parts, configures described proximity transducer, is arranged on base with screw, is driven the translation of slide block, the preferred motor of described band band-type brake motor by described band band-type brake motor.The material of above-mentioned connecting rod adopts 45 steel, and two ends are provided with stepped hole, with put into coordinate with it described in first, second bearing, small end cover described in the end face screw fastening in hole, limits the axial float of first, second bearing described.Above-mentioned x-ray source bearing is provided with an outstanding Step Shaft feature, coordinates with clutch shaft bearing inner ring described in described connecting rod one end, form revolute pair with this.Above-mentioned slide block is fixedly connected with the slide block of described single shaft driver element, and described slide block is provided with outstanding Step Shaft feature, coordinates, form revolute pair with this with the second bearing inner race described in the described connecting rod other end.Above-mentioned flat panel detector is fixedly installed on described detector bearing, and described detector bearing is fixedly installed on the slide block of described single shaft driver element.Above-mentioned single shaft driver element is finished parts, configures described proximity transducer, is arranged on the first pedestal with screw, is driven the translation of slide block, the preferred motor of described band band-type brake motor by described band band-type brake motor.Above-mentioned base and the first pedestal are 180 degree and are relatively fixedly installed on described rotating disk, and base and rotating disk are located with circular arc concave surface, the first pedestal offer waist type pin-and-hole, only allow the fine position along rotating disk radial direction.

Specific works principle is: this utility model extends the using function of the other CT scanner of bed, and conventional func is CT scan, adopts the half fan-delta sandbody mode in offset flat-panel detector and inclined X-rays source, effectively can increase scan vision.Expanded function is DR film making, adopts x-ray source and the vertical positive control of flat panel detector to penetrate projection pattern.Described x-ray source assembly and detector assembly rely on base and the first pedestal 331 to be fixedly installed on rotating disk respectively.There is 3 revolute pairs and 1 sliding pair in described x-ray source assembly, composition slider-crank mechanism, using slide block as driving link.Drive the slide block rectilinear motion of single shaft driver element 227 with band-type brake motor 228, drive base 221 to swing around block bearing 224 together with radiographic source 222 by link assembly 225, to reach the adjustment of x-ray source position.The step angle of control cincture band-type brake motor 228 can realize the location of single shaft driver element 227 slide block, thus determine the position of x-ray source, lock whole mechanism by the band-type brake device of band band-type brake motor 228 after arriving desired location, proximity transducer 229 can avoid the excess of stroke in slide block movement process.Under CT scan pattern, link assembly 225 should, perpendicular to the direction of motion of single shaft driver element 227 slide block, make mechanism be in dead-centre position.Described detector assembly is mechanism with single degree of freedom, the location of flat panel detector 332 can be realized by the step angle of control cincture band-type brake motor 335, to be with the band-type brake device of band-type brake motor 335 to lock whole mechanism after arrival desired location, proximity transducer 336 can avoid the excess of stroke in slide block movement process.The teamwork of above-mentioned x-ray source assembly and above-mentioned detector assembly, can reach the switching demand of CT scan function and DR film making function.

This utility model difference with the prior art point is: the other CT scanner of the bed on market generally adopts the fixed x-ray source of relative rotating disk and detector, only possess for patient provides CT examination function, conventional multi-detector spiral scan pattern, flying spot bundle is symmetrical relative to the vertical plane in mistake axle center.This CT scan function adopts offset flat-panel detector to add the half fan-delta sandbody mode in inclined X-rays source, and DR film making function adopts x-ray source and the vertical positive control of flat panel detector to penetrate projection pattern, extends the using function of the other CT scanner of bed.

This utility model is for the beneficial effect of prior art:

Extend the using function of the other CT scanner of bed, improve the convenience of the other CT scanner of bed, doctor can detect position according to patient, the requirement of inspection fee and image resolution ratio selects rational test mode; CT scan function adopts offset flat-panel detector to add the half fan-delta sandbody mode in inclined X-rays source, increase effectively scan vision and scan aperture, and reduces the requirement to x-ray source segment angle; DR film making function then adopts x-ray source and the vertical positive control of flat panel detector to penetrate projection pattern, checks fast affected site with low radiation dose; This utility model has CT scan concurrently, the switching mechanism of DR film making function allows CT scan visual field continuously adjustabe, and debugs easily, and control simple, positioning and locking is reliable, ensure that scanning accuracy; CT scanner of the present utility model provides tomography and perspective two kinds of imaging modes, conveniently moving, can use at emergency room, ICU and public ward, can be used for vehicle-mounted, carrier-borne and airborne, meet critical illness first aid and field trauma gives treatment to needs fast, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument.The method of service of CT scanner is transformed into " focus be put on man " from " centered by instrument ", realizes the theory that people-oriented.

In another kind of embodiment, described mobile device comprises:

Second pedestal, it is rectangle platy structure, four end lower ends, angle of described second pedestal arrange castor respectively, the medical bedstead wheel of brake disc is controlled in the band adopted in the present embodiment, braking or removable state can be in by Non-follow control medical bedstead wheel, described second two ends, base length direction respectively on be provided with go-cart handrail, be convenient to before and after can promote or pull mobile device, described medical bedstead wheel concrete structure comprises support, roller and Control Component, support, is provided with longitudinal accommodating cavity in it, roller, it is fixedly installed on the bottom of described support, Control Component, its rotation is arranged in described accommodation space, described Control Component comprises brake cam, brake disc and connect the driving plug rod of described brake cam and described brake disc up and down, driving plug rod is used for the transmission between brake cam and brake disc, described brake disc lower end is provided with brake shoes, described brake shoes is movably arranged on described roller, in the present embodiment, brake cam has two gears, first gear: brake disc presses down by brake cam, thus brake rubber block is pressed down and roller contact by brake disc, namely roller is braked, first gear is routine work gear, second gear: brake cam is turned to the second gear, namely releasing of brake cam, make brake shoes depart from roller, namely roller can move freely.In another kind of embodiment, castor can adopt the medical bedstead of three gears to take turns, it has outside two above-mentioned gears, also there is the third gear of displacement, that is, when brake cam is turned to third gear, brake disc coils with orientation and engages, and brake shoes is separated with roller, and roller can move but can only move towards a direction, be in the medical bedstead wheel under this pattern, when promoting CT scanner, effectively can control moving direction, avoiding mobile deflection, CT scanner can be moved to destination by mobile person easily, and controllability is better.

Middle control brake assemblies, it is arranged on the upper end of described handrail, and can stretch up and down along described handrail; Described second pedestal two ends handrail is respectively arranged with described middle control brake assemblies, the concrete structure of described middle control brake assemblies comprises a pair first shaft stools, a pair second shaft stools and a pair linear bearing, a pair first shaft stools, it is fixed on the medial wall of described handrail upper end, and be symmetrical set, connected by steel pipe handle between described a pair shaft stool, for push-and-pull mobile device; A pair second shaft stools, its correspondence is fixed on the described handrail medial wall of described first shaft stool lower end, is connected between described first shaft stool and the second shaft stool by first axis of guide; A pair linear bearing, it is arranged on described first axis of guide and forms the first sliding pair, linear bearing is provided with the 3rd shaft stool, connected by pull rod shaft between described a pair the 3rd shaft stools, connected by the first spring between described linear bearing and described second shaft stool, described first spring is located on described first axis of guide, thus can using steel pipe handle as stressed carrier, pull pull rod shaft, due to the effect of the first spring, need force pull rod shaft upwards to be carried, thus, linear bearing can move up and down on first axis of guide.And

Kinematic link assembly, it is arranged on the lower end of mobile device, described kinematic link component synchronization connects the control for brake end of four described medical bedstead wheels, and the telescopic end of described middle control brake assemblies is connected by the movable end of brake cable with described kinematic link assembly, is also namely connected with linear bearing, concrete, described second two ends, base length direction are respectively arranged with described middle control brake assemblies, that is have in two covers and control brake assemblies, distribution is arranged on the second two ends, base length direction, the concrete structure of described kinematic link assembly comprises: camshaft, rocking bar and the second spring, camshaft, its axial surface is set to corner angle, the two ends of described camshaft are arranged in the brake cam of two described medical bedstead wheels of described second side, base length direction, moving up and down of brake cam is realized by rotating the camshaft be fastened in brake cam, namely control the operation range of medical bedstead wheel, rotating cam axle can realize the switching of medical bedstead wheel in several gear, namely a kind of device can in braking, displacement, switch under the pattern of direction movement,

Rocking bar, it is bending component, described in each, linear bearing lower end correspondence is provided with a described rocking bar, also four rocking bars are had, and described rocking bar wears and is fixed on described camshaft, then the middle part that every root camshaft two ends are each passed through a rocking bar engages with brake cam, the upper end of described rocking bar is connected with the described linear bearing of upper end by brake cable, two described rocking bar lower ends of described second side, base width direction are by caster link pivot joint, namely the two ends of a caster link are rotationally connected the lower end to a rocking bar respectively, thus, camshaft realizes two rocking bar interlocks of the second side, base length direction, caster link realizes two rocking bar interlocks of the second side, base width direction, the upper end of each rocking bar is connected with the linear bearing of corresponding upper end by brake cable simultaneously, thus complete the interlock of four rocking bars, namely complete the coordinated signals of four medical bedstead wheels, and the middle control brake assemblies controlling any side of handrail can control the braking of four medical bedsteads wheel or displacement or any direction and moves,

Second spring, its upper end is connected with described handrail lower end, and the lower end of described second spring is connected with in the middle part of described rocking bar, under second spring makes conventional sense, the medical bedstead wheel controlled by camshaft is in application position, wherein, under initial condition, the swing position of four described rocking bars is consistent.Wherein, described second pedestal is movably set with lifting assembly, and CT scanner is arranged on described lifting assembly.

Operation principle is as follows, under normal operating conditions, four medical bedstead wheels are in on-position, namely first, second spring reset state, mobile device is stable on the ground, CT scanner is fixing on the mobile device, also movement can not be produced time in working order, four medical bedstead wheels have the control of the gear of Mechanical course stuck simultaneously, effective reduction and absorb the vibrations of CT scanner, CT scanner body can not shake substantially, thus improves scanning or the film making effect of CT scanner, enhance the performance of CT scanner, imaging effect is better.When CT scanner needs to move to another ward, with steel pipe handle as stressed carrier, manually pull the pull rod shaft of any side, linear bearing pull-up, the synchronous pull-up of brake cable, mentioned, first, second spring elongation, synchronous drive four rocking bar rotating in same directions, further drive two cam axle, and then rotation brake cam, make four medical bedstead wheel synchronism switching to moveable position, keep the pull-up position of pull rod shaft, promote steel pipe handle, mobile device entirety is moved, until move to destination, releasing lever axle, due to first, the reset force of the second spring, make camshaft backwards rotation, four medical bedstead wheels synchronously reset to application position, mobile device fixes on the ground firmly thus, avoid moving in CT scanner work process, eliminate vibrations simultaneously, improve performance, this servo-actuated with drawing, and pull rod shaft one resets, mobile device can fix on the ground, greatly facilitate staff CT scanner is moved, one man operation can be realized, push-and-pull is convenient, simultaneously without the need to going each foot of Non-follow control to take turns, go again behind in-position manually to check each foot wheel, mobile facilitation more, operability is higher, mobile more convenient, one man operation can be realized, shake little, after position is fixing, mobile device can fix on the ground inflexibly, not easily move, thus turn improve imaging or the film making performance of CT scanner, definition is higher, as can be seen here, mobile device of the present utility model has larger good Practical Performance and operability.

In another kind of embodiment, the exit window of described x-ray source generator is provided with the beam-defining clipper for limiting beam shape, the visual field indicating mechanism for the reading scan visual field is provided with in described beam-defining clipper, described visual field indicating structure comprises LED light source, beam-defining jaw and transmitting mirror, and the focus of described LED light source becomes mirror image relationship with x-ray source bulb focus relative to described reflecting mirror.Beam-defining clipper for limiting beam shape, and passes through visible illumination system simulation beam position on the detector.Source light is by after wire harness diaphragm, and reflected by reflecting mirror and expose to detector through exit window wire harness, LED focus is closed with radiographic source bulb focus and become mirror image relationship relative to reflecting mirror, and wire harness window is wolfram steel sheet rectangular window.In addition window external can filter plate for filtering scattered ray and low energy ray, improve imaging signal to noise ratio.Filter plate is driven by single axis robot, can realize rectilinear motion.Light source adopts LED light source, and colour temperature 3000K, selects condenser lens.Reflecting mirror adopts front surface aluminum reflector, visible-range internal reflection rate > 90%.Adopt the visible ray reading scan visual field, compare traditional laser cross-line, simplify the pendulum position process of patient before cone-beam CT scan.

In another kind of embodiment, the described rotating disk of described detector assembly correspondence position is provided with several balancing weights, described configuration block is used for carrying out balancing to the revolution centrifugal force of described rotary part.Turntable rotation dynamic balance calibration device is provided with in this utility model, the unbalance dynamic of turntable rotation parts easily produces inertia force and the moment of inertia of alternation, and damage Timing Belt, affects transmission accuracy and smoothness, the vibration of pedestal and complete machine can be caused simultaneously, cause detecting position precision and decline.The other mobile CT imaging system revolving part diameter of this utility model bed is about 850mm, and width is 500mm, and maximum speed 12r/min considers that rotating speed is relatively low, therefore does static balance and corrects and can meet the demands.

Revolving meber static balance condition is: be distributed in the centrifugal force of each quality on this revolving meber make a concerted effort to equal zero or the vector of mass-radius product equals zero.Namely require that the center of gravity of revolving meber is positioned on gyroaxis.This utility model adopts the method for arranging balancing weight on rotating disk with barycenter relative to the opposite direction of initial point, and counterweight principle is being tried one's best from rotary middle spindle apart from arranging small size high-quality material at a distance, and general employing proportion is the lead of 11.3kg/m3.

From the above mentioned, this utility model adopts the design of innovation imaging geometry, promotes scan aperture:

The volume of CT scanner and internal diameter mainly limited by the volume and weight of imaging geometry and image-forming block.In order to reduce the other scanner external diameter of our bed, also expand scanning holes internal diameter, we need to innovate to some extent on imaging geometry simultaneously as far as possible.Here we adopt half fan-delta sandbody mode, reduce cost to a certain extent, reduce weight; Simultaneously due to the special construction of half fan-delta sandbody, we can at rotational plane intrinsic deflection detector, thus make detector larger to the distance of center of rotation, and keep central visual field size constant.By optimizing overall construction design, we greatly can reduce scanner external diameter and length and width size, make it more flexible, expand scanner application scope.Below will from scan pattern, the aspects such as Image chain critical mechanical part design are discussed in detail.

A) half fan-beam tilt detector scan pattern

This scan pattern will significantly reduce the detector cost of scanner, reduce the requirement to x-ray source segment angle simultaneously, expand existing radiogenic selection.Under the prerequisite of equal scan vision, the flat panel detector tilting to install increases the distance of detector to center of rotation, thus actually increases the internal diameter of scanner, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument.

B) CT scan and DR film making function changing-over mechanism

Conventional CT scanners does not possess DR film making function, just radiographic source and detector is rigidly fixed on rotating disk, therefore

And the relative position relation in rotary course between radiographic source and detector and imaging precision can be ensured well.For realizing CT/DR handoff functionality, the other mobile CT radiographic source of this project bed and detector position need adjustable, switching to DR by CT half sector scanning makes film in function course, need the co-operating of Liang Zu mechanism, radiographic source requires to swing certain angle, simultaneously detector translation certain distance, two operating positions need be located very reliable, therefore require the feasible transmission of design and detent mechanism, should have following characteristics: drive mechanism rigidity is high, driving-chain is as far as possible short; Drive gap is minimum; High and the reliable lock of terminal positioning precision; Driving moment and power meet the requirements.

C) radiographic source swing mechanism

X-ray source is fixed on support, adopts crossed roller axle collar rotary support between support and installing plate, and the slide block of support and single shaft driver is hinged with connecting rod form, finally whole module is fixed on rotating disk by installing plate.The location of x-ray source relies on the moment of torsion of electromotor brake to keep.

D) detector parallel moving mechanism

Flat panel detector is connected with the transition of support by frock, is arranged on the slide block of single shaft driver, design translation distance

From being about 130mm, for ensureing translation and positioning precision, adopting single shaft driver as actuating mechanism, being installed on rotating disk by pedestal, the terminal positioning of detector relies on the moment of torsion of electromotor brake to keep.

E) beam-defining clipper and visual field indicating mechanism

Beam-defining clipper for limiting beam shape, and passes through visible illumination system simulation beam position on the detector.

Source light is by after wire harness diaphragm, and reflected by reflecting mirror and expose to detector through exit window wire harness, LED focus is closed with radiographic source bulb focus and become mirror image relationship relative to reflecting mirror, and wire harness window is wolfram steel sheet rectangular window.In addition window external can filter plate for filtering scattered ray and low energy ray, improve imaging signal to noise ratio.Filter plate is driven by single axis robot, can realize rectilinear motion.Light source adopts LED light source, and colour temperature 3000K, selects condenser lens.Reflecting mirror adopts front surface aluminum reflector, visible-range internal reflection rate > 90%.

This utility model adopts the mechanical system of innovation to form, and significantly reduces complete machine weight and volume:

A characteristic of this scanner is that volume is little, flexibly mobile, can be displaced into easily between room and between sick bed, can promptly be deployed in patient bedside and scan.Scanner adopts stability and all higher heavy caliber bearing of precision and by band wheel drive, accurately stable during rotation sweep.Whole instrument is positioned at above four Universal pulleys, brakes guarantee scanner stability operationally by controlling backpedalling brake in one.

Mechanical system mainly comprises with lower module: imaging system, elevator platform, middle control mobile platform, shell and accessory.Wherein imaging system is core detection module, form primarily of payload, rotary components, detector installation component, x-ray source installation component and synchronous belt drive mechanism, x-ray source and detector are main payload, be fixed on rotating disk, under the driving of servomotor, scan sample to be tested.Imaging system is supported by frame, is fixed on lifting working platform, can move up and down under the effect of vertical lifting mechanism, to reach suitable working depth.Middle control mobile platform is the chassis of whole system, is equipped with middle control caster brake system, controls castor at mobile and locking two kinds of MODE of operation by middle control handle in can being controlled,

This utility model adopts the scanning of quick dynamic volume and the image reconstruction based on novel algorithm for reconstructing:

The other CT of existing bed all takes fan-delta sandbody technology, very high to the vibration resistance performance requirement of instrument in helical scanning process, easily occurs motion artifacts.This utility model adopts cone-beam X-ray source and flat panel detector, can scan volume fast, completely solves the difficult problem that screw type CT is high to scanning site requirements, expands the scope of application and place.Cone-Beam CT is that its scattering ratio is larger relative to a deficiency of fan-beam.The existence of scattering reduces the contrast of imaging, adds image artifacts.We filter scattering from hardware except utilizing grid, also can correct scattering from software and eliminate simultaneously, thus carry out Recovery image quality.

Control system of the present utility model is made up of fixed frame control section and rotary frame control section, mainly comprises fixed frame master controller, rotary frame controller, touch screen, power module, data transmission, electric machine controller, motor and driver, synchronous signal circuit, laser locating apparatus and corresponding control software design etc.Frame master controller selects the Windows system of exploiting natural resources abundant to be non real-time system, selects the real-time extension plug-in unit RTX based on Windows system to be real time processing system; Rotary frame control system is as the part of function opposite independent, and the normal work of primary responsibility X source and data acquisition, receives the instruction that master controller issues, the running status etc. of feedback rotary frame.Rotary frame controller adopts and develops voluntarily based on the ARM9 processor of atmel corp.

Application software system of the present utility model mainly comprises the nucleus modules such as data management, scan control, condition monitoring, date processing, image display, communication, system maintenance, be divided into application layer, middle service layer, data communication layer to control alternation of bed etc. four layers, adopt software modularity to carry out independence exploitation.

The other CT scanner of bed of this project development, volume weight and the radiation dose of CT scanner can be effectively reduced, tomography and perspective two kinds of imaging modes are provided, conveniently moving, can use at emergency room, ICU and public ward, can be used for vehicle-mounted, carrier-borne and airborne, meet critical illness first aid and field trauma gives treatment to needs fast, the method of service of CT scanner is transformed into " focus be put on man " from " centered by instrument ", realizes the theory that people-oriented.

Adopt in this utility model:

(1) half fan-beam tilt detector scan pattern

This scan pattern will significantly reduce the detector cost of scanner, reduce the requirement to x-ray source segment angle simultaneously, expand existing radiogenic selection.Under the prerequisite of equal scan vision, the flat panel detector tilting to install increases the distance of detector to center of rotation, thus actually increases the internal diameter of scanner, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument.Under the prerequisite of identical disk diameter, by tilting flying spot, more vertical flying spot adds sweep diameter, namely meet the CT scanner of same scan diameter, it is less that disk diameter in this utility model can do, namely reduce the volume and weight of equipment, add the drag chain structure adopting unique design simultaneously, remarkable reduction complete machine weight and volume, further, rotary part only need rotate a circle can complete whole scanning process, rotation radian is reduced while reduction weight and volume, thus reduce the vibrations of positive machine, namely reduce the ground of CT scanner to work place and require high condition, make under the prerequisite ensureing image quality, the application place of CT scan is wider.

(2) DR film making, CT scan and perspective function

This function makes this other CT scanner a machine three-use by custom-designed scan pattern mapping device, improves service efficiency, meets the user demand under different condition, extend the using function of CT scanner.

(3) the middle control brake mechanism adopting two ends controlled, improves mobility, shortens instrument and locates and put time, and CT scanner moves and fixes more convenient, reduce further simultaneously and requires high condition to the ground of work place.

(4) adopt the visible ray reading scan visual field, compare traditional laser cross-line, simplify the pendulum position process of patient before cone-beam CT scan, also reduce the movement to patient, avoid causing secondary injury.

(5) super large scan aperture

Be particularly useful for, with the critical patient of the ancillary equipment such as multiple vital sign maintenance equipment, expanding the scope of application.

From the above mentioned, on mobile CT scanner model machine basis, the other CT scanner system of a kind of new bed through improvement of utility model.Half fan-beam tilt detector scan pattern of new system will significantly reduce the detector cost of scanner, reduce the requirement to x-ray source segment angle simultaneously, expand existing radiogenic selection.Under the prerequisite of equal scan vision, the flat panel detector tilting to install increases the distance of detector to center of rotation, thus actually increases the internal diameter of scanner, the convenient scanning to there being auxiliary monitoring to give first aid to the patient of instrument.The mobile CT scanner in this side reduces radiation dose by adopting pulse exposure imaging mode; Scan aperture is expanded by designing new imaging geometry; The weight and volume of scanner is reduced by optimizing frame for movement; Completely solve a screw type CT difficult problem high to scanning site requirements by dynamic volume scanning technique fast, expand the scope of application and place, meet field rescue demand.This scanner can be loaded onto on the various vehicles, and such as automobile, train, naval vessel, aircraft etc., can use at emergency room, ICU and public ward.

Miniaturization Multifunctional bedside CT scanner of the present utility model, the gross weight of effective reduction CT scanner and radiation dose, realize DR film making, CT scan and perspective function simultaneously, a machine three-use, improve service efficiency, conveniently moving, can use under the different conditions such as emergency room, ICU and public ward, can be used for vehicle-mounted, carrier-borne and airborne, meet critical illness first aid and field trauma gives treatment to needs fast.

This utility model provides a kind of small-sized bed other CT scanner, solve existing Mobile CT scanner radiation dose large, internal diameter is little, high shortcoming is required to work place, intend carrying out a series of innovation by utility model to its design, make overall design motor-driven, reduce radiation dose by pulse exposure imaging mode; Scan aperture is expanded by designing new imaging geometry; The weight and volume of scanner is reduced by optimizing frame for movement; Solve a screw type CT difficult problem high to scanning site requirements completely by dynamic volume scanning technique fast, thus expand the scope of application and the place of Mobile CT scanner, meet field rescue demand.

Although embodiment of the present utility model is open as above, but it is not restricted to listed in description and embodiment utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the general concept that claim and equivalency range limit, this utility model is not limited to specific details and illustrates here and the legend described.

Claims (10)

1. the other CT scanner of small-sized bed, is characterized in that, comprising:

Frame, its vertical rack is located on the mobile device of CT scanner;

Rotary part, it is rotated by floating bearing and is arranged in described frame, and described rotary part and frame are circular ring, and circle ring center is as the scanning holes of CT scanner;

Imaging system, it has and is arranged on described rotary part with the x-ray source assembly on sidewall and detector assembly along axle centrosymmetry, described x-ray source assembly is connected with turning cylinder with described rotary part, and described detector assembly is can the mode correspondence of translation receive from the emergent ray of described x-ray source assembly; And

Drag chain parts, it is crossed on described frame side wall, across the semi-perimeter establishing length to be no more than described frame, one end of described drag chain parts is fixed in described frame, the other end is movably arranged on the sidewall of described frame with described rotary part, and cable connects power supply and described imaging system by described drag chain parts;

Wherein, described x-ray source assembly is using taper half fan-beam as outgoing beam, described x-ray source assembly rotates to an angle, the synchronous translation of described detector to the position receiving described outgoing beam completely, simultaneously described imaging system has rotated a circle to object with dynamic volume scan mode scanning imagery process.

2. the other CT scanner of small-sized bed as claimed in claim 1, it is characterized in that, the outer ring of described floating bearing is arranged on the inner ring of described frame, and spacing with the outer ring pressing plate be arranged on another sidewall of described frame by the boss on described frame one sidewall, described floating bearing adopts can bear larger axis and the crossed roller bearing of radial load simultaneously;

Described rotary part has rotating disk, ring flange and synchronous pulley, described rotating disk and ring flange are by being connected back to the mode of bolt clamping floating bearing inner ring, described synchronous pulley is connected with screw with ring flange lateral wall, and described synchronous pulley is connected with Timing Belt with the belt wheel be arranged on immediately below described frame.

3. the other CT scanner of small-sized bed as claimed in claim 2, it is characterized in that, described x-ray source assembly comprises:

Base, its medial wall is arranged on the lateral wall of described rotating disk;

X-ray source generator, one end of its medial wall is arranged on by block bearing on the lateral wall of described base, and the beam exit window of described x-ray source assembly is arranged on the upper surface of described x-ray source generator;

First single shaft driver element, it is fixedly mounted on the lateral wall of described base, and described first single shaft driver element comprises the first slide rail, is arranged on the first slide block on the first slide rail and drives the first drive motors of described first slide block movement; And

First connecting rod assembly, its one end is rotatably connected on described first slide block, and the other end of described link assembly is rotatably connected on the other end of described x-ray source generator medial wall;

Wherein, described x-ray source generator medial wall is provided with x-ray source bearing, its one end is provided with stepped hole, itself and described pedestal bearing outer race axle are connected, described base one end is provided with outstanding Step Shaft, itself and described block bearing inner ring hole are connected, and described block bearing adopts crossed roller bearing.

4. the other CT scanner of small-sized bed as claimed in claim 3, it is characterized in that, described detector assembly comprises:

First pedestal, its medial wall is arranged on described base on obverse described rotating disk lateral wall;

Second single shaft driver element, it is fixedly mounted on described first pedestal, and described second single shaft driver element comprises the second slide rail, is arranged on the second slide block on the second slide rail and drives the second drive motors of described second slide block movement;

Detector bearing, its upper end is fixedly connected with described second slide block;

Flat panel detector, it is horizontally installed on described detector bearing, and the test surface of described flat panel detector is relative with described exit window, and described flat panel detector is vertical with the radial direction of described rotating disk all the time;

Wherein, described base and pedestal are 180 ° and are relatively fixedly installed on described rotating disk, and the vertical dimension between described base and the second pedestal is not less than the diameter of described rotating disk endoporus.

5. the other CT scanner of small-sized bed as claimed in claim 4, it is characterized in that, described drag chain parts comprise:

Drag chain, its fixed end is placed in the positive upper end of described frame, and described drag chain moved end is movably arranged on described frame side wall;

Outer ring guiding pallet, it is installed in described frame, and is in the coaxial peripheral space of described synchronous pulley;

Inner ring prerotation vane, itself and the described outer ring pallet that leads is affixed, and is coaxially arranged on the region between described outer ring guiding pallet and described synchronous pulley, and described drag chain moved end is movably arranged in the annular space that described outer ring guiding pallet and described synchronous pulley determine; And

Follower, it comprises follower roller and connected servo-actuated bent plate, and described follower roller is movably arranged in the space between described ring flange and frame, and described servo-actuated bent plate is crossed on described rotary part surface, and is fastenedly connected with described drag chain moved end;

Wherein, described drag chain adopts compound bending drag chain, and described outer ring guiding pallet is connected to the peripheral space of synchronous pulley in frame by sunk screw, the end surface thickness of described outer ring guiding pallet and inner ring prerotation vane does not exceed the end surface thickness of synchronous pulley.

6. the other CT scanner of small-sized bed as claimed in claim 5, it is characterized in that, described ring flange circumferentially edge has annular guide channel, guide groove angular range is 150 °, guide groove upper surface is fixedly installed annular pressing plate with screw, the concave profile of guide groove, annular pressing plate and frame that ring flange is offered forms the geometric space that can retrain follower roller, follower roller axis and scanning holes axis being parallel;

Within the scope of described rotary part rotates first 150 °, drag chain moved end, follower roller and servo-actuated bent plate keep absolute rest, follower roller and guide groove Structure deformation, the space free traction in scanning holes of period cable free segment, rear 230 ° of scope inner flanges pull servo-actuated bent plate to do circulatory motion together with drag chain moved end by follower roller, altogether complete 380 ° of angles of revolution.

7. the other CT scanner of small-sized bed as claimed in claim 6, it is characterized in that, described outer ring guiding pallet be arranged on described frame side wall ± angular range of 115 ° in, the positive lower ending opening of described outer ring guiding pallet, described Timing Belt connects described belt wheel and synchronous pulley through described opening, described inner ring prerotation vane is arranged on-115 ° ~ 0 ° position in region between described outer ring guiding pallet and described synchronous pulley, under CT scanner leaves standstill default conditions, drag chain moved end is positioned at-115 ° of positions, along with the rotation of described rotatable parts, drag chain moved end moves back and forth in the angular range of ± 115 °,

Wherein, in 0 ~ 115 ° of interval, the arc space that described outer ring guiding pallet and synchronous pulley are formed is allowed that drag chain is folding and is passed through, and in 0 ~-115 ° of interval, the arc space that described inner ring prerotation vane and synchronous pulley are formed allows that drag chain monolayer passes through.

8. the other CT scanner of small-sized bed as claimed in claim 1, it is characterized in that, described mobile device comprises:

Second pedestal, it is rectangle platy structure, and four of described pedestal end lower ends, angle are respectively arranged with medical bedstead wheel, described second two ends, base length direction respectively on be provided with go-cart handrail;

Middle control brake assemblies, it is arranged on the upper end of described handrail, and can stretch up and down along described handrail; And

Kinematic link assembly, it is arranged on the lower end of mobile device, and described kinematic link component synchronization connects the control for brake end of four described medical bedstead wheels, and the telescopic end of described middle control brake assemblies is connected by the movable end of brake cable with described kinematic link assembly;

Wherein, described second pedestal is movably set with lifting assembly, and CT scanner is arranged on described lifting assembly.

9. the other CT scanner of small-sized bed as claimed in claim 1, it is characterized in that, the exit window of described x-ray source generator is provided with the beam-defining clipper for limiting beam shape, the visual field indicating mechanism for the reading scan visual field is provided with in described beam-defining clipper, described visual field indicating structure comprises LED light source, beam-defining jaw and transmitting mirror, and the focus of described LED light source becomes mirror image relationship with x-ray source bulb focus relative to described reflecting mirror.

10. the other CT scanner of small-sized bed as claimed in claim 1, is characterized in that, the described rotating disk of described detector assembly correspondence position is provided with several balancing weights, and described configuration block is used for carrying out balancing to the revolution centrifugal force of described rotary part.