CN114983457A - Novel parallel hole collimator - Google Patents
Novel parallel hole collimator Download PDFInfo
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- CN114983457A CN114983457A CN202210649946.5A CN202210649946A CN114983457A CN 114983457 A CN114983457 A CN 114983457A CN 202210649946 A CN202210649946 A CN 202210649946A CN 114983457 A CN114983457 A CN 114983457A
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Abstract
The invention discloses a novel parallel hole collimator, which belongs to the technical field of collimation and comprises a plurality of longitudinal plates and a plurality of transverse plates which are arranged along the collimation direction; the plurality of longitudinal plates are parallel to each other and are distributed at intervals in a row along a first direction, the plurality of transverse plates are parallel to each other and are distributed at intervals in a row along a second direction, and the first direction and the second direction are both vertical to the collimation direction; one side of the longitudinal plate piece facing the transverse plate piece is provided with a plurality of transverse clamping grooves at intervals along the length direction, the transverse clamping grooves are matched with the transverse plate piece, one side of the transverse plate piece facing the longitudinal plate piece is provided with a plurality of longitudinal clamping grooves at intervals along the length direction, and the longitudinal clamping grooves are matched with the longitudinal plate piece, so that a plurality of parallel collimation holes are formed after the longitudinal plate pieces and the transverse plate pieces are mutually socket-fixed. The invention not only has simple processing and manufacturing and high processing and assembling precision, but also can adjust the aperture size along with the size of the scintillation crystal.
Description
Technical Field
The invention relates to the technical field of collimation, in particular to a novel parallel hole collimator.
Background
In SPECT detection, since the photons emitted by the drugs in the living body are isotropic, a collimator is required to restrict the direction of the photons incident on the detector, and the performance of the collimator directly determines the quality of the finally obtained image.
In the related art, the collimator of the conventional SPECT apparatus usually uses the magnification effect of pinhole imaging in combination with a large detector area to achieve high resolution. However, the projections obtained from different pinholes often overlap with each other, so that the projections corresponding to different pinholes cannot be well distinguished, and the final image spatial resolution is affected.
In addition, in the use of the parallel hole collimator, the collimator is composed of a compact material plate (usually an alloy of lead and a small amount of antimony), the inside of the collimator is of a honeycomb structure formed by closely arranged parallel hexagonal holes, and the holes are separated by lead clapboards. In addition, parameters such as the number, the diameter and the length of the holes in the parallel hole collimator and the thickness of the partition wall of the small hole determine the angle of the collimator for receiving photons, and also determine the spatial resolution, the sensitivity, the applicable energy range of the collimator and other performances, while the size of the holes in the traditional parallel hole collimator cannot correspond to the size of the scintillator crystal, so that the image resolution and the detection efficiency are greatly influenced.
Disclosure of Invention
Aiming at the problems that in the prior art, a parallel hole collimator is difficult to process and low in precision and the spatial resolution of an image is influenced, the invention aims to provide a novel parallel hole collimator.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a novel parallel hole collimator comprises a plurality of longitudinal plates and a plurality of transverse plates which are arranged along the collimation direction; the longitudinal plates are parallel to each other and are distributed at intervals in a row along a first direction, the transverse plates are parallel to each other and are distributed at intervals in a row along a second direction, and the first direction and the second direction are both perpendicular to the collimation direction; the longitudinal plate piece and the transverse plate piece are mutually inserted and fixed to form a plurality of parallel alignment holes.
Preferably, the first direction is perpendicular to the second direction, so that the collimating holes are rectangular.
Preferably, the plurality of transverse slots on the longitudinal plate are distributed at equal intervals, and the plurality of longitudinal slots on the transverse plate are distributed at equal intervals.
Preferably, the distance between two adjacent transverse slots is equal to the distance between two adjacent longitudinal slots.
Preferably, the number of the transverse clamping grooves is equal to that of the transverse plates, and the number of the longitudinal clamping grooves is equal to that of the longitudinal plates.
Preferably, the height of the transverse plate is smaller than that of the longitudinal plate, and the sum of the depths of the transverse clamping groove and the longitudinal clamping groove is equal to the height of the transverse plate, so that one side of the transverse plate is flush with one side of the longitudinal plate after the transverse plate and the longitudinal plate are mutually inserted and fixed.
Further, the device also comprises two transverse fixing plates and two longitudinal fixing plates which are arranged around the peripheries of the plurality of longitudinal plates and the plurality of transverse plates, wherein the transverse fixing plates are parallel to the transverse plates, and the longitudinal fixing plates are parallel to the longitudinal plates.
Preferably, one side of the transverse fixing plate facing the longitudinal plate is provided with a plurality of longitudinal clamping grooves at intervals along the length direction, and two ends of the longitudinal plate in the length direction are respectively provided with a notch groove matched with the transverse fixing plate, so that the transverse fixing plate is fixed by the longitudinal plate through a plurality of notches.
Preferably, the longitudinal plate, the transverse fixing plate and the longitudinal fixing plate are all tungsten plates.
Further, the device also comprises a shell, wherein the top surface of the shell is opened to accommodate the transverse fixing plate and the longitudinal fixing plate.
By adopting the technical scheme, the invention has the beneficial effects that:
1. due to the arrangement of the longitudinal plates and the upper transverse clamping grooves thereof, the transverse plates and the upper longitudinal clamping grooves thereof, the plurality of longitudinal plates and the plurality of transverse plates can be mutually socket-fixed, so that an assembling structure with a plurality of mutually parallel collimation holes is formed; compared with the traditional parallel hole collimator, in the technical scheme of the invention, the longitudinal plate and the transverse plate are only subjected to grooving in advance, the processing mode has the characteristics of simple manufacture and high processing precision, and in addition, the longitudinal plate and the transverse plate are convenient to assemble and disassemble, so that the parallel hole collimator provided by the invention has lower comprehensive cost and can effectively meet the requirements of SPECT detection;
2. compared with the traditional parallel hole collimator, the technical scheme of the invention can obviously improve the image resolution and the detection efficiency under the condition of ensuring the small integral size of the collimator.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a top view of a first embodiment of the present invention;
FIG. 3 is a front view of a longitudinal panel of the present invention;
FIG. 4 is a front view of a transverse panel of the present invention;
FIG. 5 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 6 is a front view of the transverse anchor plate of the present invention;
FIG. 7 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 8 is a bottom view of a third embodiment of the present invention;
fig. 9 is an exploded view of a third embodiment of the present invention.
In the figure, 1-longitudinal plate, 11-transverse clamping groove, 12-fixed clamping groove, 2-transverse plate, 21-longitudinal clamping groove, 3-transverse fixed plate, 4-longitudinal fixed plate, 5-shell, 51-bottom plate, 52-longitudinal side plate, 53-transverse side plate and 54-screw.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on structures shown in the drawings, and are only used for convenience in describing the present invention, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.
In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in light of the present general concepts, in connection with the specific context of the scheme.
Example one
A novel parallel hole collimator is shown in figures 1 and 2 and comprises a plurality of longitudinal plates 1 and a plurality of transverse plates 2 which are arranged along a collimation direction, wherein the collimation direction refers to a desired photon motion direction, the longitudinal plates 1 and the transverse plates 2 are both configured into long-strip rectangular plates and are both configured into tungsten plates, and the thickness of each tungsten plate is 0.15mm to 0.30 mm.
In this embodiment, the longitudinal plates 1 are parallel to each other and are spaced in a row along a first direction, and the transverse plates 2 are also parallel to each other and are spaced in a column along a second direction, both the first direction and the second direction being perpendicular to the alignment direction.
As shown in fig. 3, a plurality of transverse slots 11 are formed at intervals along the length direction of one side (upper side) of the longitudinal plate 1 facing the transverse plate 2, the slot width of each transverse slot 11 is matched with the thickness of the transverse plate 2 (slightly larger than the transverse plate 2 for flexible assembly and disassembly), and the number of the transverse slots 11 is equal to the number of the transverse plates 2. Similarly, a plurality of longitudinal slots 21 are formed in one side (lower side) of the transverse plate 2 facing the longitudinal plate 1 at intervals along the length direction of the transverse plate, the slot width of each longitudinal slot 21 is matched with the thickness of the longitudinal plate 1 (slightly larger than the longitudinal plate 1 so as to be flexibly disassembled and assembled), and the number of the longitudinal slots 21 is equal to that of the longitudinal plates 1, as shown in fig. 4. In this embodiment, the transverse slots 11 on the longitudinal plate 1 are disposed at equal intervals, the longitudinal slots 21 on the longitudinal plate 2 are disposed at equal intervals, and the interval between two adjacent transverse slots 11 is equal to the interval between two adjacent longitudinal slots 21. So set up for vertical slab 1 and horizontal slab socket joint back each other, can constitute a plurality of square collimation holes that are parallel to each other, and these collimation holes are the ranks form and distribute. It is easy to understand that, when the longitudinal slots 21 at the two extreme ends of the transverse plate 2 are too close to the ends of the transverse plate 2, the two extreme ends of the transverse plate 2 are usually cut in advance to prevent the outer parts of the longitudinal slots 21 from breaking, as shown in fig. 4, which does not affect the normal use of the outermost longitudinal slots 21.
It will be appreciated that in other preferred embodiments, the collimating holes may be diamond shaped by varying the angle between the first and second directions; or in another preferred embodiment, the shape of the collimating hole can be made rectangular by changing the distance between two adjacent transverse slots 11 and the distance between two adjacent longitudinal slots 21. In practical use, the shape and size of the collimating holes can be changed by reducing part of the longitudinal plate 1 and/or the transverse plate 2.
In this embodiment, the height of the transverse plate 2 is further configured to be smaller than that of the longitudinal plate 1, and the sum of the depths of the transverse clamping groove 11 and the longitudinal clamping groove 21 is equal to the height of the transverse plate 2, so that after the transverse plate 2 and the longitudinal plate 1 are mutually inserted and fixed, the top surfaces of the transverse plate 2 and the longitudinal plate 1 are flush, and only the longitudinal plate 1 is exposed on the bottom surface side. In other preferred embodiments, the height of the transverse plate 2 is equal to that of the longitudinal plate 1, and the sum of the depths of the transverse clamping groove 11 and the longitudinal clamping groove 21 is equal to that of the transverse plate 2, so that the transverse plate 2 and the longitudinal plate 1 are flush with each other at the top surface and the bottom surface after being mutually inserted and fixed. Specifically, the relationship between the heights of the transverse plate 2 and the longitudinal plate 1, and the relationship between the sum of the depths of the transverse slot 11 and the longitudinal slot 21 and the height of the transverse plate 2 or the height of the longitudinal plate 1 do not affect the implementation of the solution of the present embodiment.
Example two
In this embodiment, as shown in fig. 5, the plate further includes two transverse fixing plates 3 and two longitudinal fixing plates 4 spliced into a rectangular frame-shaped structure, the transverse fixing plates 3 and the longitudinal fixing plates 4 are both tungsten plates, and the transverse fixing plates 3 are parallel to the transverse plate 2, and the longitudinal fixing plates 4 are parallel to the longitudinal plate 1, so as to surround the peripheries of the longitudinal plate 1 and the transverse plate 2 to form protection and restraint.
In another preferred embodiment, for convenience of disassembly, as shown in fig. 6, one side (lower side) of the transverse fixing plate 3 facing the longitudinal plate 1 is provided with a plurality of the above-mentioned longitudinal slots 21 at equal intervals along the length direction thereof, and the arrangement and number of the longitudinal slots 21 on the transverse fixing plate 3 are the same as those of the transverse plate 2; meanwhile, the upper parts of the two ends of the longitudinal plate 1 in the length direction are correspondingly provided with fixing slots 12 respectively matched with the transverse fixing plates 3, as shown in fig. 3, and the width of the fixing slots 12 is configured to be 0.5 mm. So set up for the rectangle frame column structure that horizontal fixed plate 3 and longitudinal fixing plate 4 constitute can realize fixedly through horizontal fixed plate 3 and longitudinal slab 1, thereby convenient the dismantlement.
Moreover, it can be understood that the two longitudinal slots 21 located at the end of the transverse fixing plate 3 may also be configured in a notch shape, so as to avoid the problem that the outermost longitudinal slot 21 is difficult to process.
EXAMPLE III
In this embodiment, as shown in fig. 7-9, a housing 5 is further included, and the top surface of the housing 5 is opened to accommodate a rectangular frame-like configuration formed by splicing the transverse fixing plate 3 and the longitudinal fixing plate 4. For example, the housing 5 comprises a bottom plate 51, two longitudinal side plates 52 and two transverse side plates 53; wherein, two longitudinal side plates 52 and two transverse side plates 53 are fixedly connected with the bottom plate 51 through screws 54, and the adjacent longitudinal side plates 52 and transverse side plates 53 are also fixedly connected through screws 54.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. A novel parallel hole collimator is characterized in that: the device comprises a plurality of longitudinal plates and a plurality of transverse plates which are arranged along the collimation direction; the longitudinal plates are parallel to each other and are distributed at intervals in a row along a first direction, the transverse plates are parallel to each other and are distributed at intervals in a row along a second direction, and the first direction and the second direction are both perpendicular to the collimation direction; the longitudinal plate piece and the transverse plate piece are mutually inserted and fixed to form a plurality of parallel alignment holes.
2. The novel parallel-hole collimator of claim 1, wherein: the first direction is perpendicular to the second direction, so that the collimating holes are rectangular.
3. The novel parallel-hole collimator of claim 1, wherein: the plurality of transverse clamping grooves on the longitudinal plate are distributed at equal intervals, and the plurality of longitudinal clamping grooves on the transverse plate are distributed at equal intervals.
4. The novel parallel-hole collimator of claim 3, wherein: the distance between every two adjacent transverse clamping grooves is equal to the distance between every two adjacent longitudinal clamping grooves.
5. The novel parallel-hole collimator of claim 1, wherein: the number of the transverse clamping grooves is equal to that of the transverse plates, and the number of the longitudinal clamping grooves is equal to that of the longitudinal plates.
6. The novel parallel-hole collimator of claim 1, wherein: the height of the transverse plate is smaller than that of the longitudinal plate, and the sum of the depths of the transverse clamping groove and the longitudinal clamping groove is equal to the height of the transverse plate, so that one side of the transverse plate is flush with one side of the longitudinal plate after the transverse plate and the longitudinal plate are mutually socket-fixed.
7. The novel parallel-hole collimator of claim 1, wherein: the transverse fixing plates are parallel to the transverse plates, and the longitudinal fixing plates are parallel to the longitudinal plates.
8. The novel parallel hole collimator of claim 7, wherein: the transverse fixing plate is provided with a plurality of longitudinal clamping grooves at intervals along the length direction towards one side of the longitudinal plate, and the two ends of the longitudinal plate in the length direction are respectively provided with a notch groove matched with the transverse fixing plate, so that the transverse fixing plate is fixed by the longitudinal plate through a plurality of notches.
9. The novel parallel-hole collimator set forth in claim 7, wherein: the longitudinal plate, the transverse fixing plate and the longitudinal fixing plate are all tungsten plates.
10. The novel parallel-hole collimator set forth in claim 7, wherein: and the top surface of the shell is opened to accommodate the transverse fixing plate and the longitudinal fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210649946.5A CN114983457A (en) | 2022-06-09 | 2022-06-09 | Novel parallel hole collimator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210649946.5A CN114983457A (en) | 2022-06-09 | 2022-06-09 | Novel parallel hole collimator |
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| CN114983457A true CN114983457A (en) | 2022-09-02 |
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| CN202210649946.5A Pending CN114983457A (en) | 2022-06-09 | 2022-06-09 | Novel parallel hole collimator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120087462A1 (en) * | 2010-10-12 | 2012-04-12 | Abdelaziz Ikhlef | Hybrid collimator for x-rays and method of making same |
| WO2017102831A1 (en) * | 2015-12-15 | 2017-06-22 | Koninklijke Philips N.V. | Radiation detector with an anti-scatter grid |
| US20180120450A1 (en) * | 2016-03-24 | 2018-05-03 | Kabushiki Kaisha Toshiba | Collimator, radiation detector, and radiation examination apparatus |
| CN108697398A (en) * | 2016-03-08 | 2018-10-23 | 皇家飞利浦有限公司 | Combine x-ray and nuclear imaging |
| CN209056295U (en) * | 2018-11-14 | 2019-07-02 | 四川省科学城九九瑞迪数字成像技术有限公司 | A kind of rear collimator in large scale industry CT system |
| US20210298698A1 (en) * | 2020-03-30 | 2021-09-30 | Neusoft Medical Systems Co., Ltd. | X-ray collimator, x-ray detector system and ct device |
-
2022
- 2022-06-09 CN CN202210649946.5A patent/CN114983457A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120087462A1 (en) * | 2010-10-12 | 2012-04-12 | Abdelaziz Ikhlef | Hybrid collimator for x-rays and method of making same |
| WO2017102831A1 (en) * | 2015-12-15 | 2017-06-22 | Koninklijke Philips N.V. | Radiation detector with an anti-scatter grid |
| CN108697398A (en) * | 2016-03-08 | 2018-10-23 | 皇家飞利浦有限公司 | Combine x-ray and nuclear imaging |
| US20180120450A1 (en) * | 2016-03-24 | 2018-05-03 | Kabushiki Kaisha Toshiba | Collimator, radiation detector, and radiation examination apparatus |
| CN209056295U (en) * | 2018-11-14 | 2019-07-02 | 四川省科学城九九瑞迪数字成像技术有限公司 | A kind of rear collimator in large scale industry CT system |
| US20210298698A1 (en) * | 2020-03-30 | 2021-09-30 | Neusoft Medical Systems Co., Ltd. | X-ray collimator, x-ray detector system and ct device |
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