CN103126713A - Scanning bed and computed tomography (CT) system or positron emission tomography (PET) system containing scanning bed - Google Patents
Scanning bed and computed tomography (CT) system or positron emission tomography (PET) system containing scanning bed Download PDFInfo
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- CN103126713A CN103126713A CN2011104054810A CN201110405481A CN103126713A CN 103126713 A CN103126713 A CN 103126713A CN 2011104054810 A CN2011104054810 A CN 2011104054810A CN 201110405481 A CN201110405481 A CN 201110405481A CN 103126713 A CN103126713 A CN 103126713A
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Abstract
The invention provides a scanning bed and a computed tomography (CT) system or a positron emission tomography (PET) system containing the scanning bed. The scanning bed comprises a bed plate, a linear motion device and a bed support, wherein the bed plate comprises a pre-deformation plate, the pre-deformation plate has pre-deformation, under the condition that actual load is exerted, and the direction of pre-deformation and the pre-deformation plate can produce opposite deformation directions. The linear motion device is used for guiding the bed plate to conduct linear motion, and the bed support is used for supporting the bed plate and the linear motion device. The bed plate can obviously reduce drooping and/or inclination of the bed plate of the scanning bed, shortens the range of deformation of the bed plate, and reduces vibration range of the bed plate, and the range of the deformation of the bed plate is caused by different weights of patients. In addition, the scanning bed has the advantage of being low in achieving cost.
Description
Technical field
Relate generally to tomography technology of the present invention, and relate more particularly to a kind of scanning bed and comprise this scanning bed computer tomography (CT) system or PET (positron emission tomography) (PET) system.
Background technology
Fig. 1 is scanning bed 1 ' schematic diagram of prior art.This scanning bed 1 ' comprises bed board 10 ', linear motion device 11 ' and bedrest 12 ', its common supporting patient 13 '.
As can be seen from Figure 1, in the mixed sweep bed 1 ' (can be used for CT or PET) of current exploitation, in scanning process (as shown in the three width figure of left, center, right in Fig. 1, its left figure is the beginning travel position, middle graph is the middle of stroke position, right figure is whole travel position), be subject to the impact of patient's 13 ' body weight, bed board 10 ' has very large sagging (representing with dH) in Fig. 1.The whole sagging amplitude of bed board comes from the distortion of load condition lower bed board 10 ' own and the distortion of bedrest 12 '.Wherein, at first, after having loaded patient, the bed board 10 ' of cantilever design itself can produce more sagging.Secondly, the formed cantilever design of bed board 10 ' is stretched out this bed board 10 ' far away, and the distortion of bedrest 12 ' is just larger.In addition, bed board 10 ' is longer, and this sagging amplitude is larger.Simultaneously, this sagging bed board that also makes itself is difficult to the maintenance level.
Thisly saggingly not only the scanning effect can be affected, also patient's discomfort can be caused when serious.
Therefore, in the art, need a kind ofly can to overcome the scanning bed of the problems referred to above and corresponding computer tomography (CT) system or PET (positron emission tomography) (PET) system.
Summary of the invention
For achieving the above object, the invention provides a kind of scanning bedly, comprising: bed board, this bed board comprises the predeformation plate, this predeformation plate has predeformation, the direction of this predeformation with the predeformation plate in the situation that to apply the deformation direction that real load will produce opposite; Linear motion device is used for the guiding bed board and moves linearly; And bedrest, be used for bed board made and linear motion device.
The present invention also provides a kind of computed tomography systems or positron emission tomography system, comprises according to of the present invention scanning bed.
According to the present invention, in the situation that adopt the common bed board of being made by the carbon fiber of low grade and the common bedrest with moderate finite deformation, also can significantly reduce the sagging of scanning bed bed board and/or tilt, realize that cost is very low.Yet, not adopting in situation of the present invention, realize similar technique effect, just must adopt high performance material and parts, thereby greatly increase manufacturing cost.
Can realize lower distortion at the predeformation bed board that has carried out predeformation under free load according to of the present invention under load condition.
Dwindled the scope of the bed board distortion that causes because patient body weight is different according to the elastic layer of predeformation bed board of the present invention.
According to the damping that elastic layer and the gap support wheel type parts of predeformation bed board of the present invention have increased bed board, this can reduce advance bed board Oscillation Amplitude during complete swash width of bed board.
By making the linear motion device pre-tilt to keep the bed board level, compensated advance bedrest distortion during complete swash width of bed board.
Description of drawings
According to the detailed description of hereinafter carrying out with reference to accompanying drawing, the purpose of above and other of the present invention and feature will become obviously, wherein:
Fig. 1 is the scanning bed schematic diagram of prior art;
Fig. 2 is scanning bed according to the preferred embodiment of the invention schematic diagram;
Fig. 3 A and Fig. 3 B are the schematic diagrams of predeformation bed board according to an embodiment of the invention;
Fig. 4 is the method flow diagram of the predeformation bed board shown in design drawing 3A and Fig. 3 B;
Fig. 5 A-Fig. 5 D is the schematic diagram of step of the method flow diagram of key diagram 4;
Fig. 6 is the schematic diagram of the parameter that will optimize according to an embodiment of the invention;
Fig. 7 is used for the schematic diagram of explanation optimization aim according to an embodiment of the invention;
Fig. 8 is the schematic diagram that has according to an embodiment of the invention the predeformation bed board of elastic layer;
Fig. 9 illustrates the predeformation bed board 10 with elastic layer shown in Figure 8 " the diagram of principle;
Figure 10 A-Figure 10 C is the diagram that the connection mode between elastic layer and one-shot forming bed board is shown;
Figure 11 is the schematic diagram of bedrest deformation angle;
Figure 12 illustrates the scanning bed schematic diagram that bedrest has been tilted to carry out compensation;
Figure 13 A-Figure 13 C illustrates to realize assembling the diagram of the mode of linear motion device in the pre-tilt mode;
Figure 14 is the diagram that the principle of bed board altimetric compensation is shown;
Figure 15 utilizes wheeled parts bed board to be carried out the schematic diagram of the structure of gap support;
Figure 16 is the schematic diagram that further illustrates the gap support of Figure 15;
Figure 17 is the diagram that the principle that the gap of wheeled parts 14 supports is shown; And
Figure 18 is the diagram that the far-end holding state of wheeled parts 14 is shown.
In these accompanying drawings, represent same or analogous part with identical reference number.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Fig. 2 is scanning bed according to the preferred embodiment of the invention 1 schematic diagram.As shown in Figure 2, scanning bed 1 can comprise bed board 10, linear motion device 11, bedrest 12 and wheel or bearing 14, its common supporting patient 13.Wherein, linear motion device 11 is used for guiding bed board 10 and moves linearly, and bedrest 12 is used for bed board made 10 and linear motion device 11.
Should be noted that Fig. 2 just schematically.Different embodiment according to the subject invention, scanning bed 1 can have more or less parts.
Described as earlier in respect of figures 1, in the prior art, the sagging bed board that makes of bed board itself is difficult to the maintenance level.For example, in Fig. 1, the free end of bed board 10 ' (being right-hand member in Fig. 1) is obviously sagging with respect to stiff end (being left end in Fig. 1).
According to the present invention, for addressing this problem, can use the predeformation bed board 10 as shown in Fig. 3 A and Fig. 3 B.This predeformation bed board 10 produces its generation predeformation by apply in advance free load on common bed board.Wherein, the direction of this predeformation (in the situation that in Fig. 3 A for upwards) and bed board 10 are to apply the deformation direction (for example, downward) that real load will produce opposite.The predeformation bed board 10 that forms so as shown in Figure 3A.Can see, the free end of the predeformation bed board 10 shown in Fig. 3 A (being in the drawings right-hand member) is upturned.
Then, as shown in Fig. 3 B, in use, when applying real load on predeformation bed board 10 when (being represented by a plurality of arrows vertically downward) (for example patient 13 lies on predeformation bed board 10) in Fig. 3 B, effect due to this real load (for example patient 13 body weight), the right-hand member of predeformation bed board 10 perks originally is depressed, thereby makes whole bed board present the state of level.
Fig. 4 is the flow chart of the method 400 of the predeformation bed board 10 shown in design drawing 3A and Fig. 3 B.
Method 400 starts from step 410, wherein determines initial bed board predeformation parameter.Fig. 5 A-Fig. 5 D is the schematic diagram of description of step 410.As shown in Fig. 5 A, can use the common straight shape bed board of prior art as the original shape of bed board 10.Then, as shown in Fig. 5 B, apply rated load on this common straight shape bed board, this is represented by a plurality of arrows vertically downward in Fig. 5 B.Then, as shown in Fig. 5 C, for example can calculate by finite element analysis (FEA) distortion of upper surface and the lower surface of bed board 10, thereby obtain having the upper surface of distortion and the pattern curve of lower surface.The finite element data of upper and lower pattern curve should be proofreaied and correct by the measured data of bed board.In the coordinate system shown in Fig. 5 C, Y-axis is the longitudinal axis (vertical direction), and Z axis is transverse axis (horizontal direction).Then, as shown in Fig. 5 D, the pattern curve that will have the upper surface of distortion overturns symmetrically with respect to Z-direction, as the initial predeformation upper surface of bed board 10.That is to say, the pattern curve of the upper surface 10u ' in Fig. 5 C and the pattern curve of the upper surface 10u in Fig. 5 D are symmetrical with respect to Z axis.Similarly, the pattern curve that will have the lower surface of distortion overturns symmetrically with respect to Z-direction, as the initial predeformation lower surface of bed board 10.That is to say, the pattern curve of the lower surface 10b ' in Fig. 5 C and the pattern curve of the lower surface 10b in Fig. 5 D are symmetrical with respect to Z axis.Initial predeformation upper surface and underside shape curve have represented initial bed board predeformation parameter.
In step 420, the input load situation.
In step 430, the bed board predeformation parameter in the assumed (specified) load situation.
In step 440, judge whether the predeformation parameter of bed board meets optimization aim.If so, method finishes.In this case, initial bed board predeformation parameter is used as final bed board predeformation parameter.
If not, method advances to step 450, wherein moves optimizing process.
In step 450, the at first definite parameter that will optimize, these parameters can be as shown in Figure 6.In Fig. 6, choose the point 1 on Z axis ..., i ..., N, N are positive integer.Point i on Z axis is for abscissa Z (i).On upper surface, the vertical coordinate of the point of abscissa position Z (i) is Yu (i), and on lower surface, the vertical coordinate of the point of abscissa position Z (i) is Yb (i).Point i+1 on Z axis is for abscissa Z (i+1).On upper surface, the vertical coordinate of the point of abscissa position Z (i+1) is Yu (i+1), and on lower surface, the vertical coordinate of the point of abscissa position Z (i+1) is Yb (i+1), the like.Due to the deflection of vertical coordinate corresponding to each point on bed board 10 upper surfaces and lower surface, therefore can be with the value Yu (1) of the vertical coordinate of upper surface each point, Yu (2), Yu (3) ... ... Yu (i), Yu (i+1) ..., the value Yb (1) of the vertical coordinate of ..N and lower surface each point, Yb (2), Yb (3) ..., ... Yb (i), Yb (i+1) ... ... the parameter that N optimizes as needs.In addition, can also be with the thickness t 2 of the thickness t 1 of upper surface carbon fiber layer and lower surface carbon fiber layer as the parameter that needs to optimize.
In step 450, also need to determine optimization aim.Referring to Fig. 7, D1 is the deflection at P1 place, position, and D2 is the deflection at P2 place, position.Optimization aim can be to make D2-D1 (being the relative deformation between position P2 and position P1) minimize, and perhaps optimization aim can be to make D2 minimize.Wherein, P1 can be corresponding to bed board not yet mobile position (can referring to the position of the left figure of Fig. 1), and P2 can move to corresponding to bed board the position (can referring to the position of the right figure of Fig. 1) of the rightmost side.According to different application, P1 and P2 can also be other positions.
After the parameter and optimization aim of determining to optimize, just can be optimized for optimization aim the bed board predeformation parameter after being optimized to bed board predeformation parameter.Then, method finishes.In this case, the bed board predeformation parameter after optimization is used as final bed board predeformation parameter.
Wherein, can be carried out by computer the optimization of bed board predeformation parameter, perhaps in the situation that the amount of parameter seldom also can be carried out by FEA engineer oneself.
Predeformation bed board described above (as shown in Fig. 3 A and Fig. 3 B) solves the sagging problem of bed board in scanning process effectively.But, hour (for example bed board predeformation designs for general adult when real load, when child or body weight are scanned lower than average adult), real load is not sufficient to bed board is depressed into level, the free end (for example right-hand member) of bed board will be in the state that upwarps to a certain degree at this moment, also can cause patient's discomfort when serious.For addressing this problem, the present invention proposes the predeformation bed board with elastic layer.
Fig. 8 is the predeformation bed board 10 that has according to an embodiment of the invention elastic layer " schematic diagram.Below for convenience of description, the predeformation bed board 10 that Fig. 3 A-is shown in Figure 7 is called the one-shot forming bed board, with the predeformation bed board 10 shown in Fig. 8-Figure 10 C " be called the post forming bed board.In the present invention, also this one-shot forming bed board is called the predeformation plate.As shown in Figure 8, the post forming bed board 10 " increase elastic layer EL realizes on the basis of one-shot forming bed board 10.One-shot forming, post forming, repeatedly moulding process can be mould molding or non-mould molding.Elastic layer EL can comprise fiber EL1 and base material EL2.Fiber EL1 can be the enhancement mode material, for example carbon fiber or glass fibre, perhaps other fibrous materials.Base material EL2 can be for example unsaturated polyester (UP) fibre resin, rubber, etc.Similar with the front, load is also to represent with a plurality of arrows vertically downward in Fig. 8.
The effect of elastic layer EL is to reduce the bed board distortion disparity range that the body weight change due to patient 13 causes, and reduces bed board in the situation that there is no the distortion of load.Particularly, can be by applying rated load on the one-shot forming bed board 10 shown in Fig. 3 A-Fig. 3 B or desirable target load makes it become straight being shaped to, then at its bottom added resilience layer EL and the bed board with elastic layer EL is carried out post forming.At this moment, the pulling force of elastic layer EL or stress are zero.After removing load, bed board 10 " right-hand member tend to again upwarp by one-time formed shape, but due to pulling force or the stress of elastic layer EL, bed board 10 " right-hand member no longer upwarp or the amplitude that upwarps reduces, make this bed board 10 " substantially be in level.This outward appearance is more normal for patient or consumer, and can provide similar comfortableness in different patient body weight situations.
Post forming can not affect the performance of one-shot forming bed board 10.In addition, in order to improve the bed board performance, for example hardness and intensity, can carry out repeatedly molding manufacturing and process.
Should be noted that Fig. 8 just schematically.Different embodiment according to the subject invention, elastic layer EL can comprise more or less layer, and the material of these layers also can change.
Fig. 9 is be used to the predeformation bed board 10 with elastic layer shown in Figure 8 is described " the diagram of principle.In Fig. 9, S1 shows to have predeformation, there is no elastic layer, there is no the bed board shape in the situation of load, and this is corresponding to the bed board shape shown in Fig. 3 A.S2 shows to have predeformation, have elastic layer, has the bed board shape in the situation of load, this moment bed board to be in the pulling force of level and elastic layer EL be zero.S3 shows to have predeformation, have elastic layer, there is no the bed board shape in the situation of load, and the bed board right-hand member had slightly and upwarped this moment, but the amplitude that upwarps is less than S1.
Post forming bed board 10 " can guarantee: when having applied rated load or desirable target load, the pulling force of elastic layer EL is zero.When patient 13 is lighter than rated load, bed board 10 " tend to return original predeformation shape.Elastic layer EL is stretched, at bed board 10 " two ends produce pulling force.This pulling force makes bed board 10 " shape return to flat shape.Therefore, for the bed board 10 with elastic layer EL ", when lighter patient 13 lies up, the deflection of the deflection of bed board when there is no elastic layer.Zero and when appraising and deciding between load, the bed board shape will be between S3 and S2 when patient body weight.Therefore, utilize rated load to carry out the predeformation bed board 10 with elastic layer EL of post forming " can significantly reduce as damping the difference of the bed board distortion that the patient of different weight causes.
In order to obtain different deformation effect, can under different load, implement repeatedly molding to the predeformation bed board.
Between elastic layer EL and one-shot forming bed board 10, multiple connection mode can be arranged.Figure 10 A-Figure 10 C shows a plurality of examples of these connection modes.Figure 10 A shows the end connection mode, wherein connects with the CA2 place at two join domain CA1 at two ends that elastic layer EL is connected with the one-shot forming bed board.Figure 10 B shows the multiple spot connection mode, and a plurality of join domain CA1-CA4 place of wherein being connected with the one-shot forming bed board at elastic layer EL connects.Should be noted that a CA1-CA4 just schematically, in actual applications, can arrange different join domain position and quantity as required.Figure 10 C shows full connection mode, wherein with the whole contact surface CA between elastic layer EL and one-shot forming bed board 10 as join domain.
In scan period, the vibration of bed board can cause image quality issues.Therefore, make every effort in the art make the vibration of bed board lower always.When with end connection mode, multiple spot connection mode or full connection mode, one-shot forming bed board 10 being connected with elastic layer EL, the hardness of bed board increases.Therefore, the elastic layer EL on bed board can reduce the amplitude of bed board vibration.
During CT scan, the whole scanning distance that bed board is advanced is approximately 800mm-2900mm.Referring to Fig. 1, when bed board 10 ' advanced to diverse location along the Z direction, bedrest 12 ' can have different distortion, and this is because bedrest 12 ' has elasticity, gap and contilever load.Along with bed board 10 ' is advanced more and more far, bed board 10 ' also descends more and morely in Y-direction.More decline will cause image quality issues.
Referring to Fig. 1, its left height H 1 that illustrates beginning stroke position, middle graph shows the height H 2 of middle of stroke position, and right figure is the height H 3 at whole travel position place.
In order to make the bed board height be consistent, perhaps make the height change during whole CT scan as far as possible little, the invention provides a kind of bed board altimetric compensation method.The method can be included in the bed board height H 1 of measuring beginning stroke position under rated load or desirable load, then measures the bed board height H 3 (for example, referring to Fig. 1) of furthest travel position under identical upper load.Wherein, whole stroke distances is L.
Referring to Figure 11, wherein show the bedrest deformation angle.Bed board height change between beginning travel position and furthest travel position is H1-H3=dH, and this is corresponding to bedrest (for example 12 in 12 ' in Fig. 1 or Fig. 2) angle of inclination dA.That is to say tan (dA)=dH/L.
This inclination of bedrest causes bed board itself to be difficult to keep level.Therefore, the present invention proposes this inclination of bedrest is compensated.Figure 12 illustrates scanning bed 10 the schematic diagram that the inclination of bedrest 12 has been carried out compensation.Wherein, can compensate by dual mode the angle of inclination of bedrest 12.A kind of mode is that bedrest is tilted with angle dA, the direction of this inclination and real load opposite direction in the future, thus make bed board 10 keep level.Another kind of mode is to assemble linear motion device 11 in the pre-tilt mode, the direction of this pre-tilt and real load opposite direction in the future, thus make bed board 10 keep level.This dual mode may be used singly or in combin.
Further, assembling linear motion device 11 in the pre-tilt mode can realize with various ways.Figure 13 A-Figure 13 C illustrates to realize assembling the diagram of the mode of linear motion device 11 in the pre-tilt mode.Wherein, linear motion device 11 can comprise slide block 111 and guide member 112.Guide member 112 can be guide rail or screw.The first kind of way of assembling linear motion device 11 in the pre-tilt mode is to insert taperliner 15 between the upper face of the lower surface of bed board 10 and slide block 111, as shown in FIG. 13A.When installation surface, the top of bed board 10 bottoms and slide block 111 is parallel to direction of linear motion, place taperliner 15 between bed board 10 and slide block 111.This taperliner 15 has the bed board of level (the surface that namely contacts with bed board 10, surface is installed, be the upper surface of taperliner 15 in Figure 13 A) and with the slide block that angle dA tilts, surface (surface that namely contacts with slide block 111 is the lower surface of taperliner 15) is installed in Figure 13 A.By this way, the right-hand member of guide rail or screw 112 is inclined upwardly with angle dA, thereby has compensated the downward angle of inclination dA of bedrest, thereby makes bed board 10 keep level.
The second way of assembling linear motion device 11 in the pre-tilt mode is to make between the upper face of direction of linear motion and slide block 111 to have angle dA, as shown in Figure 13 B.When slide block 111 moves and the bottom of bed board 10 when the surface is installed for level along the direction of linear motion that tilts, the upper face of slide block 111 is designed to level.Wherein, there is angle dA between the upper face of direction of linear motion and slide block 111.By this way, the right-hand member of guide rail or screw 112 is inclined upwardly with angle dA, thereby has compensated the downward angle of inclination dA of bedrest, thereby makes bed board 10 keep level.
The third mode of assembling linear motion device 11 in the pre-tilt mode is to make the bottom of bed board 10 that surface tilt is installed, as shown in Figure 13 C.When slide block 111 moves and the surface is installed when being parallel to direction of linear motion in the top of bed board 10 along the direction of linear motion that tilts, the bottom of bed board 10 is installed the surface and is designed to.The bottom of bed board 10 is installed the surface and is parallel to direction of linear motion.By this way, the right-hand member of guide rail or screw 112 is inclined upwardly with angle dA, thereby has compensated the downward angle of inclination dA of bedrest, thereby makes bed board 10 keep level.
Should be noted that with upper type it is all exemplary and nonrestrictive, according to the difference of practical application, can also adopt other pre-tilt mode.Shall also be noted that angle dA is only exemplary and nonrestrictive, according to the difference of practical application, can also adopt other pre-tilt angle.
Figure 14 is the diagram that the principle of bed board altimetric compensation is shown.Its left figure is the beginning travel position, and middle graph is the middle of stroke position, and right figure is whole travel position.Can see, during the whole swash width of bed board 10, the bed board 10 of level has kept consistent height or very narrow height change scope.Stop at any position in order to ensure bed board 10, can use motor or control system with lock.Like this, the high deformation from bedrest 12 is compensated by the linear motion device of pre-tilt or bedrest inclination.
Utilize wheeled parts to carry out the gap support to bed board for further improving the sagging problem of bed board, the invention allows for.These wheeled parts can be wheel or bearing, can be also existing in this area or any wheeled parts that develop in the future.
Figure 15 utilizes wheeled parts bed board to be carried out the schematic diagram of the structure of gap support.Shown in Figure 15 is in the situation that there is no the gap supporting construction of the wheeled parts 14 of load.Can see, wheeled parts 14 are placed on bedrest 12.At this moment, there is clearance C 1 between bed board 10 and wheeled parts 14.In the situation that there is load, when described bed board advanced to certain position, bed board 10 contacted with each other with wheeled parts 14, and 14 pairs of bed boards of wheeled parts 10 form and support, thereby prevent that bed board 10 is further sagging.
Can determine in the following way C1.Referring to Figure 16, at first, measure in the situation without wheeled parts 14, under desirable load, whole swash width position, the sag of chain d1 of bed board 10 on the plane of scanning motion.Then, make bed board 10 return to the beginning scanning position, adjust wheeled parts 14, make d2=d1, this moment, the diameter of wheeled parts was S2.Wherein d2 has in the situation of wheeled parts 14, under desirable load, and whole swash width position, the sag of chain of bed board 10 right-hand members.In the situation that remove load, the clearance C 1=S1-S2 between bed board 10 and wheeled parts 14.
Should be noted that clearance C 1 is only exemplary and nonrestrictive, according to the difference of practical application, can also adopt other gap length.
Figure 17 is the diagram that the principle that the gap of wheeled parts 14 supports is shown.As shown in figure 17, the sag of chain that can effectively reduce bed board 10 is supported in the gap of wheeled parts 14.
Figure 18 shows the far-end holding state of wheeled parts 14.The gap of wheeled parts 14 support from the plane of scanning motion more close to, the sag of chain of bed board 10 is just less.In Figure 18, wheeled parts 14 from the plane of scanning motion very close to, correspondingly, in whole swash width position, the sag of chain of bed board 10 right-hand members is also very little.
Should be noted that embodiment described above is only exemplary and nonrestrictive, and those skilled in the art can design a lot of alternatives in the situation that do not depart from the scope of appended claims.The verb that uses " comprises " does not get rid of element and the element outside step and the step of putting down in writing in claims or description.The word that used before element " one " is not got rid of and is had a plurality of this elements.In the claims, any reference number that is placed in bracket all should not be construed as limitations on the claims.
Claims (15)
- One kind scanning bed, comprising:Bed board, described bed board comprises the predeformation plate, described predeformation plate has predeformation, the direction of described predeformation with described predeformation plate in the situation that to apply the deformation direction that real load will produce opposite;Linear motion device is used for guiding described bed board to move linearly; AndBedrest is used for supporting described bed board and described linear motion device.
- 2. according to claim 1 scanning bed, wherein said bed board also comprises the elastic layer that appends to described predeformation plate, is used for described predeformation plate is applied stress with described predeformation opposite direction, thereby makes described predeformation plate keep straight.
- 3. according to claim 2 scanning bed, wherein said elastic layer is connected with described predeformation plate at a plurality of join domains places.
- 4. according to claim 3 scanning bed, wherein said a plurality of join domains are positioned at two ends.
- 5. according to claim 2 scanning bed, wherein said elastic layer with the whole contact surface of described predeformation plate on be connected with described predeformation plate.
- 6. according to claim 2 scanning bed, wherein said elastic layer comprises fiber and base material.
- 7. according to claim 6 scanning bed, wherein said fiber is carbon fiber or glass fibre.
- 8. according to claim 6 scanning bed, wherein said base material is unsaturated polyester (UP) fibre resin or rubber.
- 9. according to claim 1 scanning bed, wherein said bedrest has certain inclination, the direction of described inclination and described real load opposite direction.
- 10. according to claim 1 scanning bed, wherein said linear motion device has certain inclination, the direction of described inclination and described real load opposite direction.
- 11. according to claim 10 scanning bed, wherein said linear motion device comprises slide block and guide member, the described scanning bed taperliner that is inserted between described bed board and described slide block that also comprises, the surface that contacts with described bed board of described taperliner is horizontal surface, the surface that contacts with described slide block of described taperliner is inclined surface, thereby makes described linear motion device have described inclination.
- 12. according to claim 10 scanning bed, wherein said linear motion device comprises slide block and guide member, the surface that contacts with described bed board of described slide block is horizontal surface, described linear motion device has the direction of linear motion of inclination, thereby makes described linear motion device have described inclination.
- 13. according to claim 10 scanning bed, wherein said linear motion device comprises slide block and guide member, the surface that contacts with described slide block of described bed board is inclined surface, thereby makes described linear motion device have described inclination.
- 14. according to claim 1 scanning bed, wherein said linear motion device comprises slide block and guide member, the described scanning bed wheeled parts that are placed on described bedrest that also comprise, wherein in the situation that there is no load, when described bed board is positioned at original position, there is the space between described bed board and described wheeled parts, in the situation that there is load, when described bed board advanced to certain position, described bed board and described wheeled parts contacted with each other.
- 15. a computed tomography systems or positron emission tomography system comprise that according to claim 1-14 is described scanning bed.
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| CN201110405481.0A CN103126713B (en) | 2011-11-30 | A kind of scanning bed and include this scanning bed CT system or PET system |
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| CN201110405481.0A CN103126713B (en) | 2011-11-30 | A kind of scanning bed and include this scanning bed CT system or PET system |
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| CN103126713A true CN103126713A (en) | 2013-06-05 |
| CN103126713B CN103126713B (en) | 2016-12-14 |
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| CN109171794A (en) * | 2018-08-24 | 2019-01-11 | 上海联影医疗科技有限公司 | A kind of compensation the scanning bed of bed board VERTICAL DEFORMATION, scan method and computer-readable medium |
| CN110037883A (en) * | 2019-05-07 | 2019-07-23 | 上海东软医疗科技有限公司 | It is scanning bed and with the scanning bed medical imaging equipment |
| CN110248604A (en) * | 2016-11-15 | 2019-09-17 | 反射医疗公司 | Radiation therapy subject platform |
| CN112716730A (en) * | 2020-12-04 | 2021-04-30 | 上海西门子医疗器械有限公司 | Medical equipment and sickbed thereof |
| CN115251966A (en) * | 2022-07-12 | 2022-11-01 | 赛诺威盛科技(北京)股份有限公司 | CT scanning bed sag compensation device and CT scanning equipment |
| US11801398B2 (en) | 2018-02-13 | 2023-10-31 | Reflexion Medical, Inc. | Beam station treatment planning and radiation delivery methods |
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| CN110248604A (en) * | 2016-11-15 | 2019-09-17 | 反射医疗公司 | Radiation therapy subject platform |
| CN110248604B (en) * | 2016-11-15 | 2023-07-21 | 反射医疗公司 | Radiotherapy patient platform |
| US11794036B2 (en) | 2016-11-15 | 2023-10-24 | Reflexion Medical, Inc. | Radiation therapy patient platform |
| US11801398B2 (en) | 2018-02-13 | 2023-10-31 | Reflexion Medical, Inc. | Beam station treatment planning and radiation delivery methods |
| CN109171794A (en) * | 2018-08-24 | 2019-01-11 | 上海联影医疗科技有限公司 | A kind of compensation the scanning bed of bed board VERTICAL DEFORMATION, scan method and computer-readable medium |
| CN110037883A (en) * | 2019-05-07 | 2019-07-23 | 上海东软医疗科技有限公司 | It is scanning bed and with the scanning bed medical imaging equipment |
| CN112716730A (en) * | 2020-12-04 | 2021-04-30 | 上海西门子医疗器械有限公司 | Medical equipment and sickbed thereof |
| CN115251966A (en) * | 2022-07-12 | 2022-11-01 | 赛诺威盛科技(北京)股份有限公司 | CT scanning bed sag compensation device and CT scanning equipment |
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