CN105342632A - Device for adjusting diameter of detector ring of PET (positron emission tomography) system - Google Patents
Device for adjusting diameter of detector ring of PET (positron emission tomography) system Download PDFInfo
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- CN105342632A CN105342632A CN201510616004.7A CN201510616004A CN105342632A CN 105342632 A CN105342632 A CN 105342632A CN 201510616004 A CN201510616004 A CN 201510616004A CN 105342632 A CN105342632 A CN 105342632A
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- 238000002600 positron emission tomography Methods 0.000 title abstract description 5
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 210000003734 kidney Anatomy 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 238000002059 diagnostic imaging Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/037—Emission tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
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- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
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- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine (AREA)
Abstract
The invention discloses a device for adjusting the diameter of a detector ring of a PET (positron emission tomography) system and solves the problem of complex structure and high cost of existing similar devices. The device comprises a fixed plate and a rotating plate, N slide grooves in radial spoke distribution are distributed around a center round hole of the fixed plate, and the surface of the rotating plate is provided with planar thread grooves which form the Archimedean spiral on the surface of the rotating plate. The rotating plate is fixedly suspended on the bottom surface of the fixed plate through a supporting wheel, and moving parts are mounted in the slide grooves of the fixed plate respectively and capable of radically moving along the slide grooves under the rotation action of the planar thread grooves. A connection plate is mounted on the surface of each slide groove of the fixed plate and connected with the corresponding moving part. When the device is in operation, a detector is mounted on each connection plate, and all detectors jointly form the detector ring. A motor drives the rotating plate to rotate so as to drive the detectors to move radically, and accordingly the diameter of the detector ring is changed. Compared with the existing similar devices, the device has the advantages of great structural simplification and cost reduction.
Description
Technical field
The invention belongs to medical imaging device building block, be specifically related to a kind of PET system detector annular aperture adjusting device, the size in positron emission tomography detector rings aperture can be changed, with the position of the different size of body fitting, thus improve the sensitivity of equipment.
Background technology
PET system (PET) is a kind of special medical imaging device, can construct the image that detected part reflects its physiological function according to the concrete distribution of radioactive indicator in human body or living animal.Existing PET system comprises the mechanical parts such as detector rings, data collecting system, image reconstruction software and sick bed.
The detector rings of existing PET system by multiple detector rings around looping device, ring device around annular aperture size immobilize.For the PET system that whole body is medical, in order to adapt to the detection of whole body, the annular aperture of detector rings is sufficiently large; When detecting health smaller part position with it, as head, be necessary to reduce its aperture, to improve the sensitivity of system.
Therefore, need a kind of device that can change detector rings pore size, to adapt to the position of different size.Existing mode is for each detector loads onto motor, screw mandrel, guide track system, with the size of the position thus change detector rings aperture that control each detector distance center of circle.But this method needs a large amount of motors, screw mandrel, guide rail.A medical PET system of whole body may be made up of up to a hundred detectors, and cost of dealing with problems in this way is very high.
Summary of the invention
The invention provides a kind of PET system detector annular aperture adjusting device, detector can be realized and move radially, solving existing same device complex structure, problem that cost is high, for changing the size in detector rings aperture.
A kind of PET system detector annular aperture adjusting device provided by the present invention, comprises fixed disk and rotation disc, it is characterized in that:
Described fixed disk is the rectangular slab with center hole, and it has the chute of N number of spoke radially distribution around described center hole, its cross section is convex shape, and the extended line of each chute axis intersects at the center of circle of described center hole, 6≤N≤100;
Described rotation disc is the disk with central through hole, the center of circle of disk overlaps with the center of circle of the center hole of described fixed disk, the aperture of central through hole is equal with described center hole, and rotary disk surface has flat thread groove, and described flat thread groove forms spiral of Archimedes at rotary disk surface; Described rotation disc is suspended on described fixed disk bottom surface by the support wheel distributed along its even circumferential, and the one side with flat thread groove upwards, can rotate around its center of circle under the effect of external force;
All movable part is housed in each chute of described fixed disk, described movable part bottom surface is mated with the flat thread groove of rotation disc, and under the turning effort of flat thread groove, each movable part can move radially along chute;
Each detent surface of described fixed disk is all provided with connecting plate, and itself and corresponding movable part connect and can regulate in the position radially with respect to the latter;
During work, each connecting plate is all provided with detector, each detector forms detector rings jointly.
Described PET system detector annular aperture adjusting device, is characterized in that:
Described movable part cross section is convex shape, mates with the shape of cross section of described chute, and movable part bottom surface has the ridge of twice projection, can engage with the flat thread groove of rotation disc; Movable part end face has kidney slot and tapped blind hole.
Described PET system detector annular aperture adjusting device, is characterized in that:
Described connecting plate bottom surface has locating convex block, for being slidably matched along described kidney slot; Connecting plate has connecting hole, and both sides, connecting hole bottom all have pin hole and screw respectively; Described connecting hole is mounting hole, for being coordinated with the screwed hole of described movable part through it by screw, thus not only scalable connecting plate in the position radially with respect to movable part but also by both connections; Described pin hole is used for by pin to probe position, and described screw is used for being connected with detector by screw.
When the present invention works, because each detector forming detector rings need form circle, and movable part must engage with the flat thread groove of rotation disc in installation process, when movable part fills a circle on fixed disk, due to the structural limitations of flat thread groove, often deflection angular mobility part has dislocation radially, after installing, all movable parts do not form circle, so be connected with described movable part by the connecting hole of screw through connecting plate, the locating convex block of connecting plate is coordinated with the kidney slot of movable part, can ensure that connecting plate moves diametrically relative to movable part, regulate connecting plate relative to the radial position of movable part, ensure that all detector set are circular,
When rotation disc rotates, the ridge of movable part bottom surface twice projection and the flat thread slot fit of rotation disc, under the turning effort of flat thread groove, movable part can move along the chute of fixed disk, the detector linked together by connecting plate and movable part is also followed together with movable part and is radially moved, thus changes the size in detector rings aperture.The number of turns that can rotate by controlling rotation disc when the helical pitch of flat thread is determined controls the distance of movable part movement, thus the size in accurate control loop aperture.
The present invention uses the rotation of a driven by motor rotation disc that a circle detector just can be driven radially to move, thus changes the size in detector rings aperture; Compare with the mode of existing same device by mounted motor, screw mandrel, guide rail on each detector, enormously simplify structure, saved cost.
Accompanying drawing explanation
Fig. 1 is the half sectional view of embodiment of the present invention top view;
The fixed disk top view that Fig. 2 (A) is the embodiment of the present invention;
Fig. 2 (B) is the A-A cutaway view Amplified image of Fig. 2 (A) local;
Fig. 3 (A) is rotation disc top view of the present invention,
Fig. 3 (B) is the B-B sectional view of Fig. 3 (A);
Fig. 3 (C) is connected to the upward view of fixed disk for rotation disc;
Fig. 3 (D) is the top view of fixed disk after connection rotation disc;
Fig. 3 (E) is the C-C cutaway view Amplified image of Fig. 3 (D) local;
Fig. 3 (F) is the top view of fixed disk after installation connecting plate;
Fig. 4 (A) is movable part front view;
Fig. 4 (B) is the D-D sectional view of Fig. 4 (A),
Fig. 4 (C) is the E-E sectional view of Fig. 4 (A);
Fig. 5 (A) is connecting plate front view;
Fig. 5 (B) is the F-F sectional view of Fig. 5 (A),
The front view that Fig. 5 (C) is connected with detector for connecting plate;
Fig. 5 (D) is the G-G sectional view of Fig. 5 (C).
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, embodiments of the invention comprise fixed disk 10 and rotation disc 20;
As shown in Fig. 2 (A), described fixed disk 10 is for having the rectangular slab of center hole 11, it has the chute 12 of 48 spoke distributions radially around described center hole 11, as shown in Fig. 2 (B), the cross section of chute 12 is convex shape, and the extended line of each chute 12 axis intersects at the center of circle of described center hole 11;
As shown in Fig. 3 (A), Fig. 3 (B), Fig. 3 (C), described rotation disc 20 is for having the disk of central through hole 21, the center of circle of disk overlaps with the center of circle of the center hole 11 of described fixed disk, the aperture of central through hole 21 is equal with described center hole 11, rotation disc 20 surface has flat thread groove 22, and described flat thread groove 22 forms spiral of Archimedes on rotation disc 20 surface; Described rotation disc 20 is suspended on described fixed disk 10 bottom surface by the support wheel 30 distributed along its even circumferential, and the one side with flat thread groove 22 upwards, can rotate around its center of circle under the effect of external force;
As shown in Fig. 3 (D), in each chute 12 of described fixed disk 10, movable part 40 is all housed, as shown in Fig. 3 (E), described movable part 40 bottom surface is mated with the flat thread groove 22 of rotation disc, under flat thread groove 22 turning effort, each movable part 40 can move radially along chute 12;
As shown in Fig. 3 (F), each chute 12 surface of described fixed disk 10 is all provided with connecting plate 50, and itself and corresponding movable part 40 connect and can regulate in the position radially with respect to the latter;
As shown in Fig. 4 (A), Fig. 4 (B), Fig. 4 (C), described movable part 40 cross section is convex shape, mate with the shape of cross section of described chute 12, movable part 40 bottom surface has the ridge 41 of twice projection, can engage with the flat thread groove 22 of rotation disc; Movable part 40 end face has kidney slot 42 and tapped blind hole 43.
As shown in Fig. 5 (A), Fig. 5 (B), Fig. 5 (D), described connecting plate 50 bottom surface has locating convex block 51, for being slidably matched along described kidney slot 42; Connecting plate 50 has connecting hole 52, both sides, connecting hole 52 bottom all have pin hole 53 and screw 54 respectively; Described connecting hole 52 is mounting hole, for being coordinated with the tapped blind hole 43 of described movable part 40 through it by screw, thus is connected with movable part 40 by connecting plate 50;
As shown in Fig. 5 (C), during work, each connecting plate 50 is all provided with detector 60, detector 60 is located by the pin hole 53 on connecting plate 50 and is connected with described screw 54 by screw, and each detector 60 forms detector rings jointly.
Claims (3)
1. a PET system detector annular aperture adjusting device, comprises fixed disk (10) and rotation disc (20), it is characterized in that:
Described fixed disk (10) is for having the rectangular slab of center hole (11), it has the chute (12) of N number of spoke radially distribution around described center hole (11), its cross section is convex shape, the extended line of each chute (12) axis intersects at the center of circle of described center hole (11), 6≤N≤100;
Described rotation disc (20) is for having the disk of central through hole (21), the center of circle of disk overlaps with the center of circle of the center hole (11) of described fixed disk, the aperture of central through hole (21) is equal with described center hole (11), rotation disc (20) surface has flat thread groove (22), and described flat thread groove (22) forms spiral of Archimedes on rotation disc (20) surface; Described rotation disc (20) is suspended on described fixed disk (10) bottom surface by the support wheel (30) distributed along its even circumferential, there is the one side of flat thread groove (22) upwards, can rotate around its center of circle under the effect of external force;
In each chute (12) of described fixed disk (10), movable part (40) is all housed, described movable part (40) bottom surface is mated with the flat thread groove (22) of rotation disc, under flat thread groove (22) turning effort, each movable part (40) can move radially along chute (12);
Each chute (12) surface of described fixed disk (10) is all provided with connecting plate (50), and itself and corresponding movable part (40) connect and can regulate in the position radially with respect to the latter;
During work, each connecting plate (50) is all provided with detector (60), each detector (60) forms detector rings jointly.
2. PET system detector annular aperture adjusting device as claimed in claim 1, is characterized in that:
Described movable part (40) cross section is convex shape, mate with the shape of cross section of described chute (12), movable part (40) bottom surface has the ridge (41) of twice projection, can engage with the flat thread groove (22) of rotation disc; Movable part (40) end face has kidney slot (42) and tapped blind hole (43).
3. PET system detector annular aperture adjusting device as claimed in claim 1 or 2, is characterized in that:
Described connecting plate (50) bottom surface has locating convex block (51), for being slidably matched along described kidney slot (42); Connecting plate (50) has connecting hole (52), connecting hole (52) both sides, bottom all have pin hole (53) and screw (54) respectively; Described connecting hole (52) is mounting hole, for being coordinated with the tapped blind hole (43) of described movable part (40) through it by screw, thus not only scalable connecting plate (50) in the position radially with respect to movable part (40) but also by both connections; Described pin hole (53) is for locating detector (60) by pin, and described screw (54) is for being connected with detector (60) by screw.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510616004.7A CN105342632B (en) | 2015-09-24 | 2015-09-24 | A kind of PET system detector rings aperture adjusting device |
| PCT/CN2016/099926 WO2017050280A1 (en) | 2015-09-24 | 2016-09-23 | Device for adjusting bore size of detector ring of pet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510616004.7A CN105342632B (en) | 2015-09-24 | 2015-09-24 | A kind of PET system detector rings aperture adjusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105342632A true CN105342632A (en) | 2016-02-24 |
| CN105342632B CN105342632B (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510616004.7A Active CN105342632B (en) | 2015-09-24 | 2015-09-24 | A kind of PET system detector rings aperture adjusting device |
Country Status (2)
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| CN (1) | CN105342632B (en) |
| WO (1) | WO2017050280A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104473657A (en) * | 2014-11-11 | 2015-04-01 | 东莞南方医大松山湖科技园有限公司 | Supporting unit, supporting device and emission imaging device with supporting device |
| WO2017050280A1 (en) * | 2015-09-24 | 2017-03-30 | 华中科技大学 | Device for adjusting bore size of detector ring of pet system |
| CN107616806A (en) * | 2017-09-25 | 2018-01-23 | 广东影诺数字医学科技有限公司 | PET system detector rings position regulating unit and transmitting imaging device |
| CN107744399A (en) * | 2017-09-25 | 2018-03-02 | 中派科技（深圳）有限责任公司 | High energy particle injected system and high energy particle injection control method |
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2015
- 2015-09-24 CN CN201510616004.7A patent/CN105342632B/en active Active
-
2016
- 2016-09-23 WO PCT/CN2016/099926 patent/WO2017050280A1/en active Application Filing
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| US5825031A (en) * | 1996-10-11 | 1998-10-20 | Board Of Regents The University Of Texas System | Tomographic pet camera with adjustable diameter detector ring |
| CN101990643A (en) * | 2008-04-10 | 2011-03-23 | 皇家飞利浦电子股份有限公司 | Modular multi-geometry pet system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104473657A (en) * | 2014-11-11 | 2015-04-01 | 东莞南方医大松山湖科技园有限公司 | Supporting unit, supporting device and emission imaging device with supporting device |
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| WO2017050280A1 (en) * | 2015-09-24 | 2017-03-30 | 华中科技大学 | Device for adjusting bore size of detector ring of pet system |
| CN107616806A (en) * | 2017-09-25 | 2018-01-23 | 广东影诺数字医学科技有限公司 | PET system detector rings position regulating unit and transmitting imaging device |
| CN107744399A (en) * | 2017-09-25 | 2018-03-02 | 中派科技（深圳）有限责任公司 | High energy particle injected system and high energy particle injection control method |
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| WO2019057160A1 (en) * | 2017-09-25 | 2019-03-28 | 广东影诺数字医学科技有限公司 | Position adjustment unit for detector ring of pet system and emission tomography device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105342632B (en) | 2018-03-09 |
| WO2017050280A1 (en) | 2017-03-30 |
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