JPS6115376B2 - - Google Patents
Info
- Publication number
- JPS6115376B2 JPS6115376B2 JP53008096A JP809678A JPS6115376B2 JP S6115376 B2 JPS6115376 B2 JP S6115376B2 JP 53008096 A JP53008096 A JP 53008096A JP 809678 A JP809678 A JP 809678A JP S6115376 B2 JPS6115376 B2 JP S6115376B2
- Authority
- JP
- Japan
- Prior art keywords
- radiation
- collimator
- diameter
- present
- transmitting
- 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.)
- Expired
Links
- 230000005855 radiation Effects 0.000 description 18
- 230000035945 sensitivity Effects 0.000 description 10
- 238000001514 detection method Methods 0.000 description 6
- 230000002490 cerebral effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009206 nuclear medicine Methods 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
- Nuclear Medicine (AREA)
Description
【発明の詳細な説明】
本発明は、いわゆる核医学の分野において被検
者に投与したRI（radioisotope〜放射性同位元
素）による体内の放射線分布や放射線経時変化の
測定に利用されるシンチレーシヨンカメラなどに
用いられ、その感度や分解能に多大な影響を与え
るコリメータ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scintillation camera, etc. used in the field of nuclear medicine to measure the distribution of radiation in the body and changes in radiation over time due to RI (radioisotope) administered to a subject. This relates to collimator devices that are used in the field of technology and have a significant impact on their sensitivity and resolution.
従来、被検者に投与したRIからの放射線によ
り脳循環量などの測定を行なう場合には、単に小
形の放射線検出器を多数配列し、各検出器の出力
をそれぞれ計測、計数することによつて、各検出
器に対応する部位における循環量を算出するよう
にしていた。この場合、各検出器には筒状のコリ
メータが設けられているのみであるので、検出感
度は高いが位置分解能は低く各検出器に対応する
部位ははつきりしなかつた。 Conventionally, when measuring cerebral circulation volume etc. using radiation from RI administered to a subject, it was done by simply arranging a large number of small radiation detectors and measuring and counting the output of each detector. Accordingly, the amount of circulation at the site corresponding to each detector was calculated. In this case, since each detector is only provided with a cylindrical collimator, the detection sensitivity is high but the positional resolution is low and the portions corresponding to each detector are not clearly identified.
一方、近年ではシンチレーシヨンカメラの感
度、位置分解能の向上に伴ない、シンチレーシヨ
ンカメラを使用しての脳循環量の測定が行なわれ
るようになつた。しかしながらこの場合には、全
視野を均一に測定し、且つ分解能を重視するシン
チレーシヨンカメラでは、検出感度は上述の装置
より低くならざるを得なかつた。 On the other hand, in recent years, as the sensitivity and positional resolution of scintillation cameras have improved, the amount of cerebral circulation has come to be measured using scintillation cameras. However, in this case, a scintillation camera that uniformly measures the entire field of view and places emphasis on resolution has to have lower detection sensitivity than the above-mentioned device.
ところで、従来、上記シンチレーシヨンカメラ
などに用いられているコリメータには種々の目的
のための様々なものがあるが、標準的な目的のた
めには、通常第１図ａ，ｂの様に互いに平行に多
数の小孔すなわち小径の放射線透過孔１１を設け
た鉛板からなるコリメータ１が用いられている。 By the way, there are various types of collimators used in the scintillation cameras and the like for various purposes, but for standard purposes, they are usually connected to each other as shown in Figure 1 a and b. A collimator 1 made of a lead plate is used in which a large number of small holes, that is, small-diameter radiation-transmitting holes 11 are provided in parallel.
本発明は、上記した事情にかんがみてなされた
もので、シンチレーシヨンカメラなどに用いて脳
循環量測定のように感度が重要であつてしかも検
出部位も正確に知りたいという特殊な目的を満足
し得るコリメータ装置を提供することを目的とし
ている。 The present invention has been made in view of the above circumstances, and satisfies the special purpose of using a scintillation camera or the like to measure cerebral circulation volume, where sensitivity is important and it is also desirable to accurately know the detection area. The purpose of the present invention is to provide a collimator device that obtains the desired results.
すなわち、本発明の特徴は放射線透過孔の一部
を他の放射線透過孔より大径とすることにある。 That is, the feature of the present invention is that some of the radiation-transmitting holes are made larger in diameter than other radiation-transmitting holes.
以下、図面を参照して本発明の実施例を説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第２図ａ及びｂは本発明の第１の実施例の構成
を示すものである。同図に示すコリメータ２にお
いて第１図ａ，ｂにおいて示した従来のコリメー
タ１と相違するところは、中央部に大径の放射線
透過孔２１を複数個設けたことである。他の部分
については第１図ａ，ｂと略同様の小径の放射線
透過孔２２を設けている。前記大径の放射線透過
孔２１を設けることにより中央部に局部的に感度
の高い部分が形成され、この部分では分解能は低
下するが感度は高くなる。 FIGS. 2a and 2b show the structure of a first embodiment of the present invention. The collimator 2 shown in FIG. 1 differs from the conventional collimator 1 shown in FIGS. 1a and 1b in that a plurality of large-diameter radiation transmitting holes 21 are provided in the central portion. The other portions are provided with small-diameter radiation transmitting holes 22 that are substantially similar to those in FIGS. 1a and 1b. By providing the large-diameter radiation transmitting hole 21, a locally high-sensitivity area is formed in the center, and although the resolution decreases in this area, the sensitivity increases.
このような構成とすることにより、所要とする
部位についての感度を高め、測定精度を向上する
ことが可能となるのに加えて、該部位を含む臓器
やその周辺の臓器などの輪郭形状もわかり、臓器
全体と被測定部位の関係も明確に把握できる。 By adopting such a configuration, it is possible to increase the sensitivity and improve the measurement accuracy for the desired region, and also to understand the outline shape of the organ including the region and surrounding organs. , the relationship between the entire organ and the part to be measured can be clearly understood.
第３図ａ及びｂは上記第１の実施例を利用した
本発明による第２の実施例の構成を示すものであ
る。同図ａ，ｂにおいてコリメータ２（本体）は
第２図ａ，ｂに示したコリメータ２と全く同様で
ある。そして、大径の放射線透過孔２１に挿脱し
得るように形成したアダプタ３を備えている。こ
のアダプタ３には第４図ａ，ｂにアダプタ３の詳
細を示すように前記大径の放射線透過孔２１以外
の部分と同様に小径の放射線透過孔３１が形成さ
れている。 FIGS. 3a and 3b show the structure of a second embodiment of the present invention using the first embodiment described above. In FIGS. 2A and 2B, the collimator 2 (main body) is exactly the same as the collimator 2 shown in FIGS. 2A and 2B. Further, an adapter 3 formed so as to be inserted into and removed from the large-diameter radiation transmitting hole 21 is provided. This adapter 3 is formed with a small-diameter radiation-transmitting hole 31 similar to the portion other than the large-diameter radiation-transmitting hole 21, as shown in detail in FIGS. 4a and 4b.
従つて、上記コリメータ２は大径の放射線透過
孔２１にアダプタ３を挿入することによつて従来
と全く同様の高分解能を有するコリメータとして
使用でき、且つ所望の個所のアダプタ３を取り外
すことによつて該部分の検出感度を高めることが
可能となる。この場合、コリメータ全体の任意の
部分の検出感度を操作できるようにするためには
コリメータ２全体に大径の放射線透過孔２１を設
け、その数だけアダプタ３を用意して適宜着脱す
ればよい。 Therefore, the collimator 2 can be used as a collimator with exactly the same high resolution as the conventional one by inserting the adapter 3 into the large-diameter radiation-transmitting hole 21, and can be used as a collimator with exactly the same high resolution as the conventional one, and by removing the adapter 3 at a desired location. Therefore, it becomes possible to increase the detection sensitivity of the portion. In this case, in order to be able to control the detection sensitivity of any part of the entire collimator, it is sufficient to provide the entire collimator 2 with large-diameter radiation transmitting holes 21, prepare as many adapters 3 as the number, and attach and detach them as appropriate.
なお、上述では、本発明を平行に多数の放射線
透過孔を有するいわゆるパラレルコリメータに適
用した場合について述べたが、例えば第５図ａ，
ｂに示すようにコンバージングコリメータあるい
はこれと逆の構造をなすダイバージングコリメー
タなどの如く放射状に円錐台状の放射線透過孔を
形成したコリメータ４に本発明を適用して大径の
放射線透過孔４１と小径の放射線透過孔４２を形
成するようにしてもよい。この場合、アダプタの
形状も円錐台状とすることになる。 In the above description, the present invention was applied to a so-called parallel collimator having a large number of radiation transmitting holes in parallel.
As shown in b, the present invention is applied to a collimator 4 having radially truncated conical radiation-transmitting holes, such as a converging collimator or a diverging collimator having the opposite structure, to create a large-diameter radiation-transmitting hole 41. A radiation transmitting hole 42 having a small diameter may be formed. In this case, the shape of the adapter will also be a truncated cone.
その他、本発明はその要旨を変更しない範囲内
で種々変形して実施できるものである。 In addition, the present invention can be implemented with various modifications without changing the gist thereof.
例えば、アダプタの挿入される放射線透過孔以
外の透過孔を放射線吸収係数の低い材料で閉塞す
るようにするなどしてもよく、また放射線透過孔
の径を複数種としてもよい。更に、シンチレーシ
ヨンカメラ以外の用途に使用するコリメータにも
適用できるものである。 For example, the radiation transmission holes other than the radiation transmission hole into which the adapter is inserted may be closed with a material having a low radiation absorption coefficient, or the radiation transmission holes may have a plurality of diameters. Furthermore, it can also be applied to collimators used for purposes other than scintillation cameras.
以上述べたように、本発明によれば、シンチレ
ーシヨンカメラなどに用いて脳循環量測定のよう
に感度が重要でしかも検出部位も正確に把握した
いという特殊な目的をも満足し得るコリメータ装
置が提供できる。 As described above, the present invention provides a collimator device that can be used in a scintillation camera, etc., and can satisfy special purposes such as cerebral circulation measurement, where sensitivity is important and it is desired to accurately grasp the detection area. Can be provided.
第１図ａ及びｂは従来のコリメータの構成の一
例を示すそれぞれ平面図及びそのＡ−A′断面
図、第２図ａ及びｂは本発明の第１の実施例の構
成を示すそれぞれ平面図及びそのＢ−B′断面図、
第３図ａ及びｂは本発明の第２の実施例の構成を
示すそれぞれ平面図及びそのＣ−C′断面図、第
４図ａ及びｂは同実施例におけるアダプタの構成
を示すそれぞれ平面図及びそのＤ−D′断面図、
第５図ａ及びｂは本発明のその他の実施例の構成
を示すそれぞれ平面図及びＥ−E′断面図であ
る。
２，４……コリメータ、２１，４１……大径の
放射線透過孔、２２，４２……小径の放射線透過
孔、３……アダプタ、３１……放射線透過孔。
Figures 1a and b are plan views and sectional views taken along line A-A', respectively, showing an example of the configuration of a conventional collimator, and Figures 2a and b are plan views, respectively, showing the configuration of a first embodiment of the present invention. and its BB' sectional view,
FIGS. 3a and 3b are a plan view and a sectional view taken along line C-C' of the second embodiment of the present invention, and FIGS. 4a and 4b are plan views showing the configuration of an adapter in the same embodiment. and its DD' cross-sectional view,
FIGS. 5a and 5b are a plan view and a sectional view taken along the line E-E', respectively, showing the structure of another embodiment of the present invention. 2, 4...Collimator, 21, 41...Large diameter radiation transmitting hole, 22, 42...Small diameter radiation transmitting hole, 3...Adapter, 31...Radiation transmitting hole.
Claims (1)
大径としたコリメータ本体と、このコリメータ本
体の前記大径の放射線透過孔に挿脱し得るように
形成され且つ前記他の放射線透過孔と同様に小径
の放射線透過孔が設けられたアダプタとを具備す
るコリメータ装置。1. A collimator body in which a portion of a radiation-transmitting hole has a larger diameter than other radiation-transmitting holes, and a collimator body formed so as to be able to be inserted into and removed from the large-diameter radiation-transmitting hole of the collimator body, and which is similar to the other radiation-transmitting holes. and an adapter provided with a small-diameter radiation-transmitting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP809678A JPS54102184A (en) | 1978-01-27 | 1978-01-27 | Collimator device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP809678A JPS54102184A (en) | 1978-01-27 | 1978-01-27 | Collimator device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54102184A JPS54102184A (en) | 1979-08-11 |
| JPS6115376B2 true JPS6115376B2 (en) | 1986-04-23 |
Family
ID=11683772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP809678A Granted JPS54102184A (en) | 1978-01-27 | 1978-01-27 | Collimator device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54102184A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155201B (en) * | 1984-02-24 | 1988-07-13 | Canon Kk | An x-ray exposure apparatus |
| FR2749699B1 (en) * | 1996-06-06 | 1998-10-16 | Sopha Medical Vision Internati | MULTIPLE FIELD COLLIMATOR AND MEDICAL IMAGING SYSTEM COMPRISING SUCH A COLLIMATOR |
| FR2778467B1 (en) * | 1998-05-11 | 2000-06-16 | Christian Jeanguillaume | IMPROVED HIGH-SENSITIVITY GAMMA CAMERA SYSTEM |
| JP2013120126A (en) * | 2011-12-07 | 2013-06-17 | Canon Inc | Fine structure and imaging device provided with the fine structure |
| US20130161520A1 (en) * | 2011-12-21 | 2013-06-27 | General Electric Company | System and method for collimation in imaging systems |
| JP5648965B2 (en) * | 2012-03-23 | 2015-01-07 | 克広 土橋 | Apparatus for adjusting spatial intensity distribution of radiation and spatial distribution of energy, and X-ray generator and radiation detector using the adjusting apparatus |
| US9144408B2 (en) * | 2012-11-20 | 2015-09-29 | General Electric Company | Collimators for scan of radiation sources and methods of scanning |
-
1978
- 1978-01-27 JP JP809678A patent/JPS54102184A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54102184A (en) | 1979-08-11 |
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