CN104414671A - Shielding component, manufacturing method of shielding component and PET (positron emission tomography) system - Google Patents
Shielding component, manufacturing method of shielding component and PET (positron emission tomography) system Download PDFInfo
- Publication number
- CN104414671A CN104414671A CN201310393343.4A CN201310393343A CN104414671A CN 104414671 A CN104414671 A CN 104414671A CN 201310393343 A CN201310393343 A CN 201310393343A CN 104414671 A CN104414671 A CN 104414671A
- Authority
- CN
- China
- Prior art keywords
- shielding element
- plate portion
- pet
- main part
- element according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000002600 positron emission tomography Methods 0.000 title abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910001245 Sb alloy Inorganic materials 0.000 claims description 2
- 239000002140 antimony alloy Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 description 9
- 238000003325 tomography Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002519 antifouling agent Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 229930182851 human metabolite Natural products 0.000 description 1
- 239000012216 imaging agent Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nuclear Medicine (AREA)
Abstract
The invention discloses a shielding component, a manufacturing method of the shielding component and a PET (positron emission tomography) system. The shielding component comprises a bearing portion and a main portion. The bearing portion comprises a ring part and a plate part; the main portion surrounds the ring part and is connected with the plate part.
Description
[technical field]
The present invention relates to medical imaging technology, be specifically related to positron emission computerized tomography (PET) system.
[background technology]
Positron emission computerized tomography (PET) system is a kind of important medical treatment detection device, can provide the function image of organism metabolism, thus for relevant disease particularly cancer diagnosis effective technological means is provided.PET (positron emission tomography) scanner utilizes the human metabolites such as positron radionuclide labelled glucose as developer, is obtained the metabolic information of body by the picked-up of detector detection focus to developer.Its image-forming principle is: the free electron of a positron in tissue launched during positron radionuclide decay is combined to be buried in oblivion, and be converted into both direction contrary, energy is respectively the γ photon of 511KeV.When the scintillation probe that subtend is arranged in emitter both sides receives this pair γ photon simultaneously, just determine this nucleic and be positioned on the line (be called and meet line, LOR) of two probes, this detection mode meets detection exactly.By the algorithm for reconstructing of computer, image reconstruction is carried out to the sensing point carrying spatial positional information that all directions detect, obtain the distribution in nucleic space in vivo, just generate the image with positron radionuclide information.
The scan vision of PET depends on and the detector length along scan channel direction is usually about 15-30cm, much smaller than the length of human body.Thus when causing data acquisition, the gamma-rays that other positions of the human body outside scan vision are launched is got on detector, these interference rays may form random coincidence event, affect signal noise ratio (snr) of image, the image quality of reduction.
[summary of the invention]
Technical problem to be solved by this invention is to provide a kind of shielding element for positron emission computerized tomography (PET) system.
The present invention solves the problems of the technologies described above the technical scheme adopted to be to provide a kind of shielding element, and it comprises supporting part and main part, and described supporting part comprises circle portion and plate portion, described main part circling ring portion and combining with plate portion.
Further, described circle portion and/or plate portion are made up of the one of aluminum, rustless steel, ordinary carbon steel.
Further, described main part is for casting is plumbous or lead-antimony alloy is made.
Further, described circle portion is perpendicular to plate portion.
Further, described plate portion is provided with the bellmouth along the circumferential direction distributed, and one-body molded on described main part have some rivets combined with bellmouth.
Another technical problem to be solved by this invention is to provide a kind of manufacture method for the shielding element of positron emission computerized tomography (PET) system.
The present invention solves the problems of the technologies described above the manufacture method that the technical scheme adopted is to provide a kind of shielding element, comprises the steps: to provide supporting part, and described supporting part comprises circle portion and plate portion; Carry out casting lead after supporting part and mould being nested together and form main part; Described main part wales circle portion.
Further, described plate portion is provided with some taper holes, and described casting lead forms the rivet combined with taper hole.
Further, described circle portion is combined by welding with plate portion.
Another technical problem to be solved by this invention is to provide a kind of for positron emission computerized tomography (PET) system.
The present invention is that to solve the problems of the technologies described above the technical scheme adopted be a kind of PET system, comprise PET frame, rack-mounted housing cylinder and the detector along housing cylinder circumferential directions, described housing cylinder is provided with scan channel, it is characterized in that: described PET system also comprises and is arranged in PET frame and is positioned at the shielding element of the both sides, front and back of scan channel.
Further, shielding element is concordant with detector two ends near the side of detector.
The present invention contrasts prior art following beneficial effect: by installing shielding element before and after frame, effectively can stop the interference ray outside PET scan vision, improves picture quality; And shielding element structure is simple, easily manufactured, intensity is good, and cost is low.
[accompanying drawing explanation]
Fig. 1 is the structural representation of shielding element;
Fig. 2 is the sectional view of shielding element;
Fig. 3 is the installation site-side cutaway view of shielding element;
Fig. 4 is the installation site-elevation cross-sectional view of shielding element;
Fig. 5 is the shielding schematic diagram of shielding element to ray;
In figure:
1-lead screen ring, 101-casts lead, 102-aluminum circle, 103-aluminium sheet, 104-fixing hole, the plumbous rivet of 105-, 2-frame, 3-housing cylinder, 4-detector, 5-circuit board, 6-scan channel, 7-patient, 8-true coincidence event, 9-random coincidence event, the interference ray that 10-is shielded by lead screen ring, interference ray outside 11-scan vision, the interference ray outside 12-scan vision.
[detailed description of the invention]
Below in conjunction with drawings and Examples, the invention will be further described.
Please refer to Fig. 1-2; Shielding element 1 of the present invention structure roughly in the form of a ring, comprising: by the main part made by casting plumbous 101, and the supporting part made by aluminum circle (circle portion) 102 and aluminium sheet (plate portion) 103.Described aluminium sheet 102 is provided with the fixing hole 104 along the circumferential direction distributed, for shielding element 1 is fixed on frame 2, aluminium sheet 102 is also provided with circumferential taper hole 105.The preferred aluminum alloy materials of supporting part in the present embodiment manufactures aluminum circle 102 and aluminium sheet 103, in other embodiments, other materials also can be selected as rustless steel, ordinary carbon steel etc.Also can add a certain proportion of antimony in casting plumbous 101, improve the bulk strength of shielding element 1.
First aluminum circle 102 and aluminium sheet 103 are welded together when the shielding element 1 of the embodiment of the present invention manufactures, being then nested together with mould (not shown), it is plumbous to carry out casting.Lead water flows into the structure that the taper hole 105 of aluminium sheet 103 forms class leady rivet 1031 and casting plumbous 101 and aluminium sheet 102 is combined securely.During casting cooling, because the thermal coefficient of expansion of lead is greater than aluminum, just make to wale aluminum circle 102 tightly during plumbous cooling meat, improve overall intensity well.The surface spraying protective paint of casting lead and plumbous rivet, avoids installation and maintenance personnel directly to contact toxic metals lead.
Please refer to Fig. 3-4, the positron emission computerized tomography system 100 of the embodiment of the present invention comprises PET frame 102, is arranged on the housing cylinder 3 in frame 102 and the detector 4 along housing cylinder 3 circumferential directions.Housing cylinder 3 is provided with scan channel 6, and shielding element 1 is arranged on the front and back both sides of PET frame 102 along scan channel 6, and is fixed in PET frame 102 by the fixing hole 104 on aluminium sheet 103 by screw (not shown).Shielding element 1 need be concordant with detector two ends near the side of detector 4, and oversize meeting is blocked segment detector and reduced scan vision scope, the too short interference gamma-rays that cannot shield to greatest extent outside scan vision.
Please refer to Fig. 3-5, and emphasis is with reference to figure 5.During PET scanning, the radiological imaging agent injected in advance in patient body launches gamma-rays along all directions, true coincidence thing in scan vision, 8 is the valid data producing PET image, and the annihilation event outside the visual field cannot form true coincidence event, but random coincidence event 9 may be formed and become interfering signal.When after installation lead screen ring, the interference ray 10 outside part scan vision, by casting lead screen, is conducive to significantly reducing interference ray, improves picture quality.
The beneficial effect of the present embodiment is: by installing lead screen ring before and after frame, effectively can stop the interference ray outside PET scan vision, improves picture quality.Lead screen ring structure disclosed in the present embodiment is simple, and easily manufactured, intensity is good, and cost is low.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (10)
1. a shielding element, it comprises supporting part and main part, and described supporting part comprises circle portion and plate portion, it is characterized in that: described main part circling ring portion and combining with plate portion.
2. shielding element according to claim 1, is characterized in that, described circle portion and/or plate portion are made up of the one of aluminum, rustless steel, ordinary carbon steel.
3. shielding element according to claim 1, is characterized in that, described main part is for casting is plumbous or lead-antimony alloy is made.
4. shielding element according to claim 1, is characterized in that, described circle portion is perpendicular to plate portion.
5. shielding element according to claim 1, is characterized in that, described plate portion is provided with the bellmouth along the circumferential direction distributed, and one-body molded on described main part have some rivets combined with bellmouth.
6. a manufacture method for shielding element, comprises the steps:
There is provided supporting part, described supporting part comprises circle portion and plate portion;
Carry out casting lead after supporting part and mould being nested together and form main part; Described main part wales circle portion.
7. the manufacture method of shielding element according to claim 6, is characterized in that, described plate portion is provided with some taper holes, and described casting lead forms the rivet combined with taper hole.
8. the manufacture method of shielding element according to claim 6, is characterized in that, described circle portion is combined by welding with plate portion.
9. a PET system, comprise PET frame, rack-mounted housing cylinder and the detector along housing cylinder circumferential directions, described housing cylinder is provided with scan channel, it is characterized in that: described PET system also comprises and is arranged in PET frame and is positioned at the shielding element as described in any one of claim 1-5 of the both sides, front and back of scan channel.
10. PET system according to claim 9, is characterized in that, shielding element is concordant with detector two ends near the side of detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310393343.4A CN104414671B (en) | 2013-09-02 | 2013-09-02 | Shielding element, its manufacturing method and PET system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310393343.4A CN104414671B (en) | 2013-09-02 | 2013-09-02 | Shielding element, its manufacturing method and PET system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104414671A true CN104414671A (en) | 2015-03-18 |
| CN104414671B CN104414671B (en) | 2018-08-03 |
Family
ID=52965543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310393343.4A Active CN104414671B (en) | 2013-09-02 | 2013-09-02 | Shielding element, its manufacturing method and PET system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104414671B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9696439B2 (en) | 2015-08-10 | 2017-07-04 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
| US9990718B2 (en) | 2016-02-29 | 2018-06-05 | Shanghai United Imaging Healthcare Co., Ltd. | System and method for reconstructing ECT image |
| US12298454B2 (en) | 2015-08-10 | 2025-05-13 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11101874A (en) * | 1997-09-26 | 1999-04-13 | Shimadzu Corp | Emission CT device |
| US20020179843A1 (en) * | 2001-06-05 | 2002-12-05 | Eiichi Tanaka | Positron emission tomography apparatus |
| CN1449502A (en) * | 2000-08-30 | 2003-10-15 | 浜松光子学株式会社 | PET device |
| CN1849095A (en) * | 2003-09-08 | 2006-10-18 | 皇家飞利浦电子股份有限公司 | Imaging system with non-circular patient aperture |
| CN1910475A (en) * | 2004-01-15 | 2007-02-07 | 皇家飞利浦电子股份有限公司 | Asymmetric axial filter for pet imaging systems |
| CN101449975A (en) * | 2007-12-06 | 2009-06-10 | 西门子公司 | Device for superposed magnetic resonance and positron emission tomography imaging |
| CN202235413U (en) * | 2011-08-19 | 2012-05-30 | 北京大基康明医疗设备有限公司 | Radiation diagnosis system |
| CN202886612U (en) * | 2012-08-08 | 2013-04-17 | 北京辛耕普华医疗科技有限公司 | Collimator for gamma radioactive-source position indicator |
| CN203328712U (en) * | 2013-07-15 | 2013-12-11 | 北京锐视康科技发展有限公司 | PET-CT split type rod source shielding mechanism |
-
2013
- 2013-09-02 CN CN201310393343.4A patent/CN104414671B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11101874A (en) * | 1997-09-26 | 1999-04-13 | Shimadzu Corp | Emission CT device |
| CN1449502A (en) * | 2000-08-30 | 2003-10-15 | 浜松光子学株式会社 | PET device |
| US20020179843A1 (en) * | 2001-06-05 | 2002-12-05 | Eiichi Tanaka | Positron emission tomography apparatus |
| CN1849095A (en) * | 2003-09-08 | 2006-10-18 | 皇家飞利浦电子股份有限公司 | Imaging system with non-circular patient aperture |
| CN1910475A (en) * | 2004-01-15 | 2007-02-07 | 皇家飞利浦电子股份有限公司 | Asymmetric axial filter for pet imaging systems |
| CN101449975A (en) * | 2007-12-06 | 2009-06-10 | 西门子公司 | Device for superposed magnetic resonance and positron emission tomography imaging |
| CN202235413U (en) * | 2011-08-19 | 2012-05-30 | 北京大基康明医疗设备有限公司 | Radiation diagnosis system |
| CN202886612U (en) * | 2012-08-08 | 2013-04-17 | 北京辛耕普华医疗科技有限公司 | Collimator for gamma radioactive-source position indicator |
| CN203328712U (en) * | 2013-07-15 | 2013-12-11 | 北京锐视康科技发展有限公司 | PET-CT split type rod source shielding mechanism |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9696439B2 (en) | 2015-08-10 | 2017-07-04 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
| US9835740B2 (en) | 2015-08-10 | 2017-12-05 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
| US10877169B2 (en) | 2015-08-10 | 2020-12-29 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for pet detector |
| US11378702B2 (en) | 2015-08-10 | 2022-07-05 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
| US11782175B2 (en) | 2015-08-10 | 2023-10-10 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
| US12298454B2 (en) | 2015-08-10 | 2025-05-13 | Shanghai United Imaging Healthcare Co., Ltd. | Apparatus and method for PET detector |
| US9990718B2 (en) | 2016-02-29 | 2018-06-05 | Shanghai United Imaging Healthcare Co., Ltd. | System and method for reconstructing ECT image |
| US10535166B2 (en) | 2016-02-29 | 2020-01-14 | Shanghai United Imaging Healthcare Co., Ltd. | System and method for reconstructing ECT image |
| US11557067B2 (en) | 2016-02-29 | 2023-01-17 | Shanghai United Imaging Healthcare Co., Ltd. | System and method for reconstructing ECT image |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104414671B (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mawlawi et al. | Multimodality imaging: an update on PET/CT technology | |
| EP3030154B1 (en) | Pet system with crystal and detector unit spacing | |
| JP6088297B2 (en) | Imaging system and method | |
| Pichler et al. | Positron emission tomography/magnetic resonance imaging: the next generation of multimodality imaging? | |
| JP5623182B2 (en) | X-ray grid alignment system and medical imaging system | |
| US11529108B2 (en) | Methods and apparatus for improving the image resolution and sensitivity of whole-body positron emission tomography (PET) imaging | |
| US20030058984A1 (en) | Retractable collimator apparatus for a CT-PET system | |
| CN105125231B (en) | A kind of minimizing technology and device of PET image ring artifact | |
| Tashima et al. | First prototyping of a dedicated PET system with the hemisphere detector arrangement | |
| US20040227091A1 (en) | Methods and apparatus for radiation detecting and imaging using monolithic detectors | |
| JP2008206977A (en) | Overlapping display device for magnetic resonance tomography image and positron emission tomography image | |
| EP2578149A2 (en) | Variable pet device | |
| CN102429668A (en) | Functional-molecular-structural imaging system and method | |
| CN104414671A (en) | Shielding component, manufacturing method of shielding component and PET (positron emission tomography) system | |
| Auer et al. | Inclusion of quasi-vertex views in a brain-dedicated multi-pinhole SPECT system for improved imaging performance | |
| JP5279394B2 (en) | Positron emission tomography-magnetic resonance tomography combined system | |
| Lan et al. | First clinical experience of 106 cm, long axial field-of-view (LAFOV) PET/CT: an elegant balance between standard axial (23 cm) and total-body (194 cm) systems | |
| US11207046B2 (en) | Methods and systems for a multi-modal medical imaging system | |
| Liu et al. | Performance evaluation of a small‐animal PET/CT system based on NEMA NU 4–2008 standards | |
| Onishi et al. | Whole reconstruction-free system design for direct positron emission imaging from image generation to attenuation correction | |
| US6410919B1 (en) | Positron gun for pet attenuation measurements | |
| CN203328712U (en) | PET-CT split type rod source shielding mechanism | |
| Kajáry et al. | Comparison of the International Harmonization Project, London and Gallamini criteria in the interpretation of 18F-FDG PET/CT examinations after first-line treatment in Hodgkin’s lymphoma | |
| US20150351710A1 (en) | Mri-pet cephalic molecular imaging coil and mri-pet cephalic molecular imaging system | |
| EP3617750A1 (en) | Theranostic imaging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201815 No. 1180 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201815 No. 1180 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 201807 2258 Chengbei Road, Jiading District, Shanghai Patentee after: Shanghai Lianying Medical Technology Co.,Ltd. Address before: 201815 No. 1180 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee before: Shanghai Lianying Medical Technology Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |