Background technology
At present, PET(positron emission tomography, positron emission tomography) scanning device is most advanced and sophisticated in the world medical imaging diagnosis equipment, adopted the Medical Imaging Technology at the enterprising pedestrian's body of molecular level functional image.
The key technical indexes such as the position resolution of PET scanning device, sensitivity all depend on the detector system that it adopts, therefore PET detector is the core component of nuclear medicine facility.
PET scanning device consists of scanning gantry, examinating couch, computer system, operating console etc.Wherein, scanning gantry is provided with module mounting plate, and what the module of detector was evenly distributed in the form of a ring is arranged on described module mounting plate, to form the detector rings of PET detector.
Please refer to Fig. 1-4, Fig. 1 is the perspective view of a kind of set-up mode of detector in prior art; Fig. 2 is the Facad structure schematic diagram of detector shown in Fig. 1; Fig. 3 is the profile of a kind of mounting means of module in prior art; Fig. 4 is the profile of the another kind of mounting means of module in prior art.
As depicted in figs. 1 and 2, it is upper that module 1 ' is arranged on module mounting plate 2 ', and modules 1 ' arranges in the form of a ring, and modules 1 ' is all along the extending radially outwardly of detector, the divergent structure shown in formation Fig. 2.Therefore, in definition near the direction at detector center is, by the center-diameter of detector to away from direction be outside, the gap between two adjacent modules 1 ' is cumulative trend from inside to outside, that is to say, the inner of two adjacent blocks 1 ' is bonded to each other, and with inner face separately near collimator 3 ', as shown in Figure 2.
While carrying out the installation of module 1 ', because the inner of module 1 ' is limited, substantially there is not installing space, therefore, in prior art, conventionally adopt the fixing mounting means in outer end.As shown in Figure 3, the connecting plate 11 ' of module 1 ' is provided with screw in its outer end, and module mounting plate 2 ' is also provided with screw in corresponding position, can the outer end of module 1 ' be fixed by screw.
In above-mentioned mounting means, because the inner of module 1 ' is unfixing, reduced the connection reliability of whole module 1 ', often cause the buckling deformation of its inner crystal.
For the problems referred to above, prior art can also adopt presser type structure to connect.As shown in Figure 4, can pressing plate 4 ' be set at the end face of module 1 ', then near the inner position axis of module 1 ' to running through a screw rod 5 ', to the inner of module 1 ' is fixed.
But above-mentioned connected mode must adopt longer screw rod to install, brought inconvenience to the I&M of module 1 '; Meanwhile, after adopting long bolt to install, the stability of whole module 1 ' is also lower.
Therefore, how to design a kind of detector rings to PET detector, to realize the location of module the inner, and then the installation reliability of raising module, be the current technical issues that need to address of those skilled in the art.
Summary of the invention
The detector rings that the object of this invention is to provide a kind of PET detector, the inner of its module can effective location, and then can improve the installation reliability of module.
Another object of the present invention is to provide a kind of PET detector, and the connection of its detector rings is more reliable.
For solving the problems of the technologies described above, the invention provides a kind of detector rings of PET detector, comprise module and module mounting plate, described module is connected with described module mounting plate with the connecting plate of its bottom, the inner of described connecting plate and module mounting plate is provided with the connected structure cooperatively interacting, described connected structure comprises socket and insert, described socket radially extends setting, described connecting plate can move radially by relatively described module mounting plate, so that described insert moves to the end bayonet socket of described socket and fixes.
In detector rings of the present invention, in the inner of connecting plate and module mounting plate, be provided with the connected structure cooperatively interacting, although installation and the working place of module the inner are limited, but can move radially connecting plate, and then insert is moved to the end bayonet socket of socket, so that the outer end bayonet socket clamping of insert and described socket is fixing, realize the location to module the inner.
Visible, said structure, by the setting of connected structure, has been realized the location of module the inner, and whole position fixing process only need can be realized by moving radially of connecting plate, not only simple in structure, and it is also comparatively convenient to operate; On the other hand, socket and insert simple in structure, under the effect of radial force, can directly realize clamping or remove and connect, without any auxiliary positioning part, compare with the inner that can only adopt long bolt to be arranged on module in prior art, save the inconvenience that the installation and removal of long bolt brings, made whole installation and maintenance more simple and convenient; Because connected structure is arranged on connecting plate and module mounting plate, therefore can not produce and interfere with the crystal of inside modules, more without running through crystal, when realizing the inner location of module, have effectively protected the integrity of module; In addition, aspect the reliability connecting, between insert and socket, clamping fastening force is larger, is enough to realize the location requirement of module the inner in all directions, therefore location, the inner of detector rings of the present invention is comparatively reliable, has avoided inner buckling deformation; Finally, the simple and flexible more such as the setting position of connected structure and structure.
Preferably, described socket is stepped convergent setting from front to back in the axial direction, and described insert is the pinledge coordinating with described socket.
Socket and insert can stepped in the axial direction settings, in the time of in insert injects socket, can by hierarchic structure, realize the axial location of connecting plate and module mounting plate, prevent that module generation from axially rocking.
Preferably, described insert is embedded in described socket, and connecting plate or module mounting plate can not stretched out in the two ends of insert, can not affect the laminating of two plate faces, also just can not affect the normal mounting of module.
Preferably, described insert and described socket are separately positioned on the inner of described module mounting plate and described connecting plate.
Preferably, the both sides of the inner face of described connecting plate are recessed setting all, so that the recess of two adjacent described connecting plates is spliced to form described socket, described insert is arranged on described module mounting plate, the relatively described module mounting plate of described connecting plate footpath is inwardly moved, to drive the outer end bayonet socket of described socket to shift to described insert.
Preferably, the outer end of described connecting plate and module mounting plate is provided with the latch structure cooperatively interacting, described latch structure comprises pin-and-hole and pin, described pin-and-hole is major axis slotted hole diametrically, described pin equals described insert to the radial distance of the end bayonet socket of described socket to the radial distance of the stomidium of described pin-and-hole, and described stomidium and described end bayonet socket are in same one end.
When the outer end of connecting plate and module mounting plate adopts latch structure to be connected, the length direction that pin-and-hole can be set is for radially, to match with inner socket, and then by driving radially relatively moving of connecting plate and module mounting plate, make pin and insert synchronously navigate to respectively the stomidium of pin-and-hole and the end bayonet socket of socket; That is to say, now, by the moving radially of connecting plate and module mounting plate, can realize the inner of connecting plate and module mounting plate and the synchronous location of outer end, this structure is comparatively simple, it is comparatively convenient to operate, and has improved largely the installation and removal efficiency of module.
Preferably, the extended line of described pin and described insert line is through the center of described detector rings.
Preferably, described detector rings also has the compressing member that described insert is pressed to the end bayonet socket of described socket.
Preferably, described compressing member is eccentric bushing, has for the installing hole of described eccentric bushing is installed on described connecting plate, and described module mounting plate has the fixed axis coordinating with described eccentric bushing.
The present invention also provides a kind of PET detector, comprises the detector rings for scanning, and described detector rings is the detector rings described in above-mentioned any one.
Because PET detector of the present invention has the detector rings described in above-mentioned any one, therefore the technique effect that the detector rings described in above-mentioned any one produces is all applicable to PET detector of the present invention, repeat no more herein.
Accompanying drawing explanation
Fig. 1 is the perspective view of a kind of set-up mode of detector in prior art;
Fig. 2 is the Facad structure schematic diagram of detector shown in Fig. 1;
Fig. 3 is the profile of a kind of mounting means of module in prior art;
Fig. 4 is the profile of the another kind of mounting means of module in prior art;
Fig. 5 is the perspective view of detector rings provided by the present invention in a kind of specific embodiment;
Fig. 6 be shown in Fig. 5 in detector rings individual module be arranged on the local amplification stereogram on module mounting plate;
Fig. 7 is the local enlarged diagram of A part in Fig. 6;
Fig. 8 is the local enlarged diagram of B part in Fig. 6;
Fig. 9 is the axial cutaway view after module shown in Fig. 6 is installed;
Figure 10 is the Facad structure schematic diagram after module shown in Fig. 6 is installed;
Figure 11 is the profile in A-A cross section in Figure 10;
Figure 12 is the profile in B-B cross section in Figure 10;
Figure 13 is the stereochemical structure partial schematic diagram of a kind of set-up mode of module mounting plate provided by the present invention;
Figure 14 is the partial front structural representation of module mounting plate shown in Figure 13;
Figure 15 is the section structure axonometric chart of detector rings provided by the present invention;
Figure 16 is the local amplification stereogram of connecting plate and a kind of set-up mode of module mounting plate in detector rings provided by the present invention;
Figure 17 is the local amplification stereogram of the another kind of set-up mode of connecting plate and module mounting plate in detector rings provided by the present invention.
In Fig. 1-4:
1 ' module, 11 ' connecting plate, 2 ' module mounting plate, 3 ' collimator, 4 ' pressing plate, 5 ' screw rod
In Fig. 5-17:
1 module, 11 connecting plates, 111 installing holes, 2 module mounting plates, 21 fixed axis, 3 connected structures, 31 sockets, 32 inserts, 4 latch structures, 41 pin-and-holes, 42 pins, 5 compressing members, 6 screw holes
The specific embodiment
Core of the present invention is to provide a kind of detector rings of PET detector, and the inner of its module can effective location, and then can improve the installation reliability of module.
Another core of the present invention is to provide a kind of PET detector, and the connection of its detector rings is more reliable.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
In PET detector of the present invention, the critical piece that detector rings is detection scanning, is described in detail detector rings of the present invention below in conjunction with accompanying drawing.
It should be noted that, herein described axially, radially all take PET detector as reference with the noun of locality such as circumferential, be parallel to the direction of detector axis for axial, correspondingly, perpendicular to detector axis to direction for radially, take the center of detector is the center of circle, take arbitrarily long as radius draw the formed circumferencial direction of circle be described circumferentially.
Herein described inside and outside be also to take PET detector as reference, near the direction at detector center, be in, correspondingly, away from the direction at its center, be outside; Described front and back refer in the axial direction, and the direction corresponding with the bottom of module 1 is rear, and correspondingly, the direction relative with rear is the place ahead; Described both sides refer to the left and right sides making progress in the week of detector.
Please refer to Fig. 5-9, Fig. 5 is the perspective view of detector rings provided by the present invention in a kind of specific embodiment; Fig. 6 be shown in Fig. 5 in detector rings individual module be arranged on the local amplification stereogram on module mounting plate; Fig. 7 is the local enlarged diagram of A part in Fig. 6; Fig. 8 is the local enlarged diagram of B part in Fig. 6; Fig. 9 is the axial cutaway view after module shown in Fig. 6 is installed.
In a kind of specific embodiment, detector rings of the present invention comprises module 1 and module mounting plate 2, and some module 1 circumferential array, on module mounting plate 2, form circulus, detector rings of the present invention namely, as shown in Figure 5.
The bottom of modules 1 is provided with connecting plate 11, so that realization is connected with module mounting plate 2: as shown in Figure 6, connecting plate 11 can be for radially extending the tabular structure of rectangle arranging, and its main part that radially module 1 can be stretched out in two ends is extended to inside and outside both sides, connector or connecting hole position can be set at the inside and outside two ends of connecting plate 11, realization is connected with module mounting plate 2.
Particularly, the inner of the inner of connecting plate 11 and module mounting plate 2 is provided with the connected structure 3 cooperatively interacting, connected structure 3 comprises socket 31 and insert 32, socket 31 radially extends setting, and in its inside and outside two ends, have at least an end to be provided with end bayonet socket, insert 32 can achieve a fixed connection with described end bayonet socket; Connecting plate 11 and module mounting plate 2 can be realized and relatively moving diametrically, when both radially relatively move, insert 32 also can change with the relative position of socket 31 thereupon, and then can be so that insert 32 moves to the position of described end bayonet socket, so that insert 32 is fixed in the bayonet socket of described end, realized the location, the inner of connecting plate 11 and module mounting plate 2.
Due to the setting of above-mentioned connected structure 3, move radially the inner location that connecting plate 11 can be realized connecting plate 11 and module mounting plate 2, not only simple to operate, locate also reliablely, avoided the inner generation buckling deformation of module.
Obviously, insert 32 can be arranged on module mounting plate 2, and socket 31 is arranged on connecting plate 11; Also socket 31 can be arranged on module mounting plate 2, insert 32 is arranged on connecting plate 11.
Meanwhile, the inside and outside two ends of described socket 31 can all arrange end bayonet socket, and insert 32 can be selected to be connected with the end bayonet socket of the inner or outer end as required; Also can only in the inner or the outer end of socket 31, end bayonet socket be set, the other end is set to opening shape or arbitrary shape, will inwardly move or move connecting plate 11 outward according to the footpath, position of end bayonet socket herein.
Insert 32 can be embedded in socket 31, as shown in Figure 7, the axial two ends of socket 31 are not stretched out at the axial two ends of insert 32, can not exert an influence to the axial laminating of connecting plate 11 and module mounting plate 2, can not affect other structure generations of outside yet.
A kind of comparatively preferred embodiment in, socket 31 can be arranged on connecting plate 11, as shown in Fig. 7 and Fig. 9, the inner face local dent of connecting plate 11 to be to form the socket 31 of similar C type, the outer end of socket 31 sealings forms bayonet socket, is outer end bayonet socket; Now insert 32 can be arranged on module mounting plate 2, while installing, inwardly promote connecting plate 11, in outer end bayonet socket with drive socket 31, move, and then outer end bayonet socket is moved towards insert 32, so that outer end bayonet socket fixes insert 32, form the detector rings after installing.
Those skilled in the art are to be understood that, also socket 31 can be set in the inner of module mounting plate 2, the inner of socket 31 or outer end can arrange end bayonet socket, then insert 32 is arranged on connecting plate 11, then drive connecting plate 11 to move radially, fixing so that insert 32 snaps in the bayonet socket of end.
On the basis of the above, in the outer end of connecting plate 11 and module mounting plate 2, latch structure 4 can also be set, as shown in Figure 8 and Figure 9.Described latch structure 4 can comprise pin-and-hole 41 and pin 42, pin-and-hole 41 is set to major axis slotted hole diametrically, and Zhong You one end, inside and outside two ends of pin-and-hole 41 is provided with stomidium, described stomidium can fix pin 42, and described stomidium is arranged on and the end bayonet socket of socket 31 position with one end; Pin 42 to the radial distance of described stomidium equals insert 32 to the radial distance of the end bayonet socket of described socket 31.
Adopt above-mentioned latch structure 4 can realize the location, outer end of connecting plate 11 and module mounting plate 2.Simultaneously, latch structure 4 cooperatively interacts with inner connected structure 3, when relative module mounting plate 2 generations of connecting plate 11 move radially, pin 42 and insert 32 synchronously move towards the stomidium of pin-and-hole 41 and the end bayonet socket of socket 31 respectively, until conflict and fix with corresponding port.
Visible, the setting of above-mentioned latch structure 4 and connected structure 3 cooperatively interact, and have realized respectively connecting plate 11 and module mounting plate 2 outer ends and inner fixing.
In addition, in pin 42 and insert 31, one at least wherein can be arranged on simulation installing plate 2; Meanwhile, the extended line of both lines can be through the center of detector rings, and both are on same RADIAL.
When moving radially connecting plate 11, pin 42 is radially in the interior movement of pin-and-hole 41, thereby connecting plate 11 is carried out to auxiliary positioning, prevents that connecting plate 11 from producing and circumferentially rocking in the process moving radially, and then prevent from its interference to adjacent block 1 from improving assembly precision.
Obviously, analogy insert 32 and socket 31 arrange the structure of pin 42 and pin-and-hole 41 respectively.For example, pin 42 can adopt other locating pins to substitute; Pin 42 can be embedded in pin-and-hole 41.
Please further refer to Figure 10-12, Figure 10 is the Facad structure schematic diagram after module shown in Fig. 6 is installed; Figure 11 is the profile in A-A cross section in Figure 10; Figure 12 is the profile in B-B cross section in Figure 10.
As shown in Fig. 7, Fig. 9, Figure 10 and Figure 12, socket 31 can be set to ladder cavernous structure in the axial direction, and described shoulder hole is convergent setting in direction from front to back; Insert 32 can be set to the pinledge coordinating with socket 31,, when the bayonet socket of the end of insert 32 insertion sockets 31, also can, by the location in hierarchic structure realization axially, further improve the reliability connecting.
Described insert 32 can be shop bolt, or the structure such as rivet, polished rod, when radial location is carried out in the inner of 32 pairs of modules 1 of insert, the structures such as the head of a nail can also be set, so that this head of a nail is pressed on the cascaded surface of two adjacent shoulder holes in socket 31, be about to the inner axial compression of connecting plate 11 on module mounting plate 2, realize the axial location of connecting plate 11.
On the other hand, in the outer end of connecting plate 11 and module mounting plate 2, screw hole 6 can also be set, as shown in figure 11, screw hole 6 can be arranged on the circumferential both sides of pin-and-hole 41, then axially runs through screw, to assist the location of realizing outer end.
Can also detector rings of the present invention mentioned above be further improved.
Please refer to Figure 13-15, Figure 13 is the stereochemical structure partial schematic diagram of a kind of set-up mode of module mounting plate provided by the present invention; Figure 14 is the partial front structural representation of module mounting plate shown in Figure 13; Figure 15 is the section structure axonometric chart of detector rings provided by the present invention.
For realizing moving radially of connecting plate 11, detector rings of the present invention can also comprise compressing member 5, as shown in Figure 13-15.Drive described compressing member 5, can drive connecting plate 11 inside and outside mobile diametrically, to change the relative position relation of insert 32 and socket 31, and then make insert 32 be pressed to the bayonet socket place, end of socket 31.
At length, compressing member 5 can be eccentric bushing, on connecting plate 11, there is the installing hole 111 for setting-up eccentricity cover, module mounting plate 2 is provided with the fixed axis 21 coordinating with eccentric bushing, so that eccentric bushing inserts fixed axis 21, then screw eccentric bushing, eccentric bushing acts on the inner hole wall of installing hole 111 with its outer wall, and then promotion connecting plate 11 moves radially.
Certainly, realize the mode that connecting plate 11 and module mounting plate 2 move radially various, be not limited to the structure of above-mentioned eccentric bushing, for example, can adopt and special push away handle, screw the structures such as bar, to assist, realize moving radially of connecting plate 11.
In addition, as shown in figure 15, when pin 42 is built in pin-and-hole 41, pin-and-hole 41 can be arranged on to the part that connecting plate 11 is provided with module bodies, because pin 42 is built in pin-and-hole 41, can not exert an influence to module 1.Visible, adopt embedded structure setting, make the setting position of latch structure 4 more flexible, in like manner know by inference, when insert 32 is embedded in socket 31, its setting position is also relatively flexible.
Can also carry out further refinement to detector rings of the present invention mentioned above.
Please refer to Figure 16 and Figure 17, Figure 16 is the local amplification stereogram of connecting plate and a kind of set-up mode of module mounting plate in detector rings provided by the present invention; Figure 17 is the local amplification stereogram of the another kind of set-up mode of connecting plate and module mounting plate in detector rings provided by the present invention.
When the position of socket 31 and insert 32 is set, insert 32 and socket 31 all can be arranged on to the inner of detector rings, for example insert 32 and socket 31 are separately positioned on to the inner of described module mounting plate and described connecting plate, both can be arranged on the position near the radial centre lines of connecting plate 11, as shown in figure 16.
Or, can be arranged on external arbitrarily beyond radial centre lines.Therein in a kind of embodiment, can be arranged on inner both sides, as shown in figure 17, insert 32 is arranged on to two positions that end is corresponding that making progress in week with connecting plate 11, be arranged on the position corresponding with the both sides of connecting plate 11, then in the circumferential both sides of connecting plate 11, breach is all set, and the breach of adjacent connecting plate 11 cooperatively interacts, be jointly spliced to form a socket 31.
That is to say, the all recessed settings of the both sides of connecting plate 11 inner faces, to form depressed part, and the depressed part of two adjacent connecting plates 11 can cooperatively interact, and then be spliced to form a socket 31, between two adjacent connecting plates 11, be provided with insert 32, the both sides of connecting plate 11 all can be positioned; When the bayonet socket of the end of insert 32 insertion sockets 31, the both sides of connecting plate 11 all can be fixedly connected with insert 32, have effectively improved reliability of positioning, prevent that connecting plate 11 from upwards producing and rocking in week.
For the needs of display structure, in Figure 16 and Figure 17, the crystal block section of module 1 is removed, but this should not be construed as the restriction to detector rings of the present invention.In like manner, also have the incomplete structure of different situations in above-mentioned accompanying drawing, this can not be interpreted as any restriction to the application.
Above PET detector provided by the present invention and detector rings thereof are described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand core concept of the present invention.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.