JPH032584A - Animal fixing device for positron ct device - Google Patents
Animal fixing device for positron ct deviceInfo
- Publication number
- JPH032584A JPH032584A JP13716389A JP13716389A JPH032584A JP H032584 A JPH032584 A JP H032584A JP 13716389 A JP13716389 A JP 13716389A JP 13716389 A JP13716389 A JP 13716389A JP H032584 A JPH032584 A JP H032584A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- gantry
- auxiliary plate
- upper plate
- detectors
- 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
- 241001465754 Metazoa Species 0.000 title claims abstract description 16
- 230000005251 gamma ray Effects 0.000 claims abstract description 3
- 239000011358 absorbing material Substances 0.000 claims abstract 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 241000282693 Cercopithecidae Species 0.000 abstract description 17
- 230000005855 radiation Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 7
- 210000004556 brain Anatomy 0.000 abstract description 6
- 206010061307 Neck deformity Diseases 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 210000003739 neck Anatomy 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 206010002091 Anaesthesia Diseases 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000037005 anaesthesia Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は動物の頭部の断層像を計測するためのポジトロ
ンＣＴ装置における動物固定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an animal fixation device in a positron CT apparatus for measuring tomographic images of an animal's head.
「従来の技術」
ポジトロンＣＴ装置は、被検体として人間のみならず、
猿などの動物も計測する。"Conventional technology" Positron CT equipment can be used not only for human subjects, but also for human subjects.
Animals such as monkeys are also measured.
しかるに、・従来より計測時に被検体である猿（１）は
第３図に示すように、４本の支柱（２）に椅子のような
アクリル製固定下板（３）を設けて猿（１）をこの上に
腰掛けさせ、首部分はアクリル製固定上板（４）の切欠
き（５）から嵌め込み、さらにその上から切欠き（６）
を有するアクリル製の補助板（７）で狭みつけて固定す
る。この状態で第２図に示すように、ガントリ（８）の
１−ンネル（９）内に猿（１）の頭部（１０）を挿入し
て頭部座位計測を行なう。However, as shown in Figure 3, conventionally the monkey (1), which is the subject to be measured, is ) is seated on this, and the neck part is fitted through the notch (5) of the acrylic fixed top plate (4), and then the notch (6) is inserted from above.
Narrow and fix with an acrylic auxiliary plate (7) having a In this state, as shown in FIG. 2, the head (10) of the monkey (1) is inserted into the channel (9) of the gantry (8) to measure the head sitting position.
「発明が解決しようとする課題」
従来の頭部座位計測は猿（１）の頭部（１０）を固定上
板（４）と補助板（７）とで挟み込むため半固定状態と
なり、手足等も肩より上らないため安定した計測が可能
である。"Problems to be Solved by the Invention" In the conventional head sitting position measurement, the head (10) of the monkey (1) is sandwiched between the fixed upper plate (4) and the auxiliary plate (7), resulting in a semi-fixed state, and the head position of the monkey (1) is semi-fixed. Since it does not rise above the shoulders, stable measurements are possible.
ところが、脳の研究の進歩とＣＴ装置の高分解能とが相
俟って、最近では脳の下部（首のつけ根付近）を測定す
ることが要求されてきている。しかし、猿（１）の首が
短かいため、ガントリ（８）の下部のシールドコリメー
タ（１１）、固定上板（４）、補助板（７）が邪魔をし
てトンネル（９）の有効視野の奥深く進入させることが
できず、充分な計測ができないという問題があった。前
記下部のシールドコリメータ（１１）を除けば進入させ
ることもできるが、γ線放出率の高い心臓（１２）から
のγ線が放射線検出器（１３）に入射して測定精度を悪
化させるという問題がある。However, due to advances in brain research combined with the high resolution of CT equipment, there has recently been a demand for measurements of the lower part of the brain (near the base of the neck). However, because the monkey (1) has a short neck, the shield collimator (11), fixed upper plate (4), and auxiliary plate (7) at the bottom of the gantry (8) interfere with the effective view of the tunnel (9). There was a problem in that it was not possible to penetrate deep into the water, and it was not possible to take sufficient measurements. Although it is possible to enter the shield collimator (11) by removing the lower shield collimator (11), there is a problem that the gamma rays from the heart (12), which has a high gamma ray emission rate, enter the radiation detector (13) and deteriorate the measurement accuracy. There is.
本発明は動物の頭部座位計測において、脳の下部を充分
に測定できるような装置を得ることを目的とするもので
ある。An object of the present invention is to obtain a device that can sufficiently measure the lower part of the brain when measuring the head position of an animal.
「課題を解決するための手段」
本発明は、被検体の動物を固定下板に腰掛けさせ、首部
分を固定上板と補助板とで狭みつけて固定してその頭部
をガントリのトンネル内に進入せしめて断層像を得るよ
うにした装置において、前記ガントリはトンネルの進入
側のシールドコリメータを除き、かつ前記固定上板と補
助板の少なくともいずれか一方をシールドコリメータと
して作用するようにγ線吸収材で構成してなるものであ
る。``Means for Solving the Problems'' The present invention involves making a subject animal sit on a lower fixed plate, narrowing the neck between the upper fixed plate and an auxiliary plate, and fixing the animal's head inside the tunnel of a gantry. In the apparatus for obtaining tomographic images by entering the tunnel, the gantry excludes the shield collimator on the entrance side of the tunnel, and the gantry is arranged such that at least one of the fixed upper plate and the auxiliary plate acts as a shield collimator. It is made of absorbent material.
「作用」
被検体である猿に麻酔処理した後、または麻酔処理をす
ることなく、固定下板の上に座らせ、首部分を固定上板
と補助板で固定する。この状態で頭部をガントリのトン
ネル内に固定して断層像のデータを計測する。すると、
放射線放出強度の著しく高い心臓からのγ線は固定上板
と補助板のシールドコリメータとしての作用により頭部
への影響を阻止または低減する。``Operation'' After the subject monkey is anesthetized or without anesthesia, it is seated on a fixed lower plate, and its neck is fixed with the fixed upper plate and auxiliary plate. In this state, the head is fixed inside the gantry tunnel and tomographic data is measured. Then,
The effects of gamma rays from the heart, which emit extremely high radiation intensity, on the head are prevented or reduced by the fixed upper plate and the auxiliary plate acting as shield collimators.
「実施例」 以下、本発明の一実施例を図面に基づき説明する。"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.
（１）はガントリで、このガントリ（１）の中央には被
検体である猿（１）の頭部（１０）を進入せしめるため
のトンネル（９）が設けられている。(1) is a gantry, and in the center of this gantry (1) is provided a tunnel (9) through which the head (10) of a monkey (1), which is a subject, enters.
前記ガントリ（８）はγ線を検出するための多数の放射
線検出器（１３）・・・をリング状に並べてなるもので
、１個の検出器（１３）はシンチレータ（１４）と光電
子増倍管（１５）を対としてなり、これをさらに３〜５
重にし、また、放射線検出器（１３）・・・の外側にだ
けシールドコリメータ（１７）が設けられている。The gantry (8) is made up of a large number of radiation detectors (13) arranged in a ring shape for detecting gamma rays, and one detector (13) has a scintillator (14) and a photomultiplier. The tubes (15) are made into a pair, and this is further connected to 3 to 5 tubes.
In addition, a shield collimator (17) is provided only on the outside of the radiation detector (13).
このシールドコリメータ（１７）は外側からの背景雑音
（散乱線、単一γ線）の入射を低減するようになってお
り、さらに必要に応じて各シンチレータ（１４）毎にス
ライスコリメータ（１６）が設けられる。This shield collimator (17) is designed to reduce the incidence of background noise (scattered rays, single gamma rays) from the outside, and if necessary, a slice collimator (16) is installed for each scintillator (14). provided.
前記猿（１）を座位状態に固定するための動物保持装置
（１８）は、４本の支柱（２）と、猿（１）を腰掛けさ
せるための固定下板（３）と、猿（１）の首を固定する
ために一方側から切欠（５）を有する固定上板（４）と
、この切欠（４）を被覆するために他方側から切欠（６
）を有する補助板（７）とからなる。The animal holding device (18) for fixing the monkey (1) in a sitting position includes four pillars (2), a lower fixing plate (3) for seating the monkey (1), and a holding device (18) for fixing the monkey (1) in a sitting position. ) with a notch (5) from one side for fixing the neck of the neck, and a notch (6) from the other side to cover this notch (4).
) and an auxiliary plate (7).
これらのうち、固定下板（３）はアクリル樹脂板などか
らなるが、固定上板（４）と補助板（７）の少なくとも
いずれか一方については、従来の内側のシールドコリメ
ータ（１１）の作用をするように、γ線を透過しにくい
材料、例えば鉛、タングステンまたはこれらの合金で構
成する。Among these, the fixed lower plate (3) is made of an acrylic resin plate, etc., but at least one of the fixed upper plate (4) and the auxiliary plate (7) is operated by the conventional inner shield collimator (11). It is made of a material that does not easily transmit gamma rays, such as lead, tungsten, or an alloy thereof.
以上のような構成において、被検体である猿（１）に麻
酔処理をした後、または麻酔処理をすることなく、固定
下板（３）の上に腰掛けさせ、首の部分を固定上板（４
）と補助板（７）の切欠（５）（６）で挟みつけるよう
にして固定する。そして猿（１）の頭部（１０）をガン
トリ（８）のトンネル（９）内へ送りこむ。すると、猿
（１）の頭部（１０）から放射されたγ線が放射線検出
器（１３）・・・のシンチレータ（１４）・・・で検出
し、光電子増倍管（１５）・・で増幅され出力する。こ
のとき、放射線放出強度の著しく強い心臓（１２）が固
定上板（４）と補助板（７）でマスクされ、頭部（１０
）の断層像への影響を低減する。In the above configuration, after the subject monkey (1) is anesthetized or without anesthesia, the subject is seated on the fixed lower plate (3), and the neck part is placed on the fixed upper plate (3). 4
) and the notches (5) and (6) of the auxiliary plate (7) to secure it. The head (10) of the monkey (1) is then sent into the tunnel (9) of the gantry (8). Then, the gamma rays emitted from the head (10) of the monkey (1) are detected by the scintillator (14) of the radiation detector (13), and are detected by the photomultiplier tube (15). Amplified and output. At this time, the heart (12), which has an extremely strong radiation emission intensity, is masked by the fixed upper plate (4) and the auxiliary plate (7), and the head (10)
) on the tomographic image.
「発明の効果」
本発明は上述のように構成したので、つぎのような効果
を有する。"Effects of the Invention" Since the present invention is configured as described above, it has the following effects.
（１）ガントリのトンネルのスペースを有効に利用でき
、したがって、首の短かな動物の脳下部（首のつけ根付
近）まで計測できる。(1) The space of the gantry tunnel can be used effectively, and therefore measurements can be taken up to the lower part of the brain (near the base of the neck) of animals with short necks.
（２）ガントリ内の一方側のシールドコリメータが不要
となるので、構造が簡単で、メンテナンスも容易となる
。(2) Since there is no need for a shield collimator on one side inside the gantry, the structure is simple and maintenance is easy.
第１図は本発明によるポジトロンＣＴ装置の動物固定装
置の１実施例を示す断面図、第２図は従来の装置の断面
図、第３図は動物固定装置の斜視図である。
（１）・・被検体（猿）、（２）・・・支柱、（３）・
・・固定下板、（４）・・・固定」１板、（５）・・・
切欠、（６）・・・切欠、（７）・・・補助板、（８）
・・・ガントリ、（９）−・・トンネル、（１０）・・
頭部、（１１，）、（１７）・−・シールドコリメータ
、（１２）・・心臓、（１３）・・放射線検出器、（１
４）・・・シンチレータ、（１５）・・・光電子像倍管
、（１６）・・スライスコリメータ、（１８）・・被検
体保持装置。
＝７FIG. 1 is a sectional view showing one embodiment of the animal fixation device of the positron CT apparatus according to the present invention, FIG. 2 is a sectional view of a conventional device, and FIG. 3 is a perspective view of the animal fixation device. (1)... Subject (monkey), (2)... Support, (3)...
・・Fixed lower plate, (4) ・・Fixed” 1 plate, (5) ・・
Notch, (6)... Notch, (7)... Auxiliary plate, (8)
...Gantry, (9)-...Tunnel, (10)...
Head, (11,), (17) -- Shield collimator, (12) Heart, (13) Radiation detector, (1
4)...scintillator, (15)...photoelectron image intensifier, (16)...slice collimator, (18)...subject holding device. =7
Claims (3)
固定上板と補助板とで狭みつけて固定してその頭部をガ
ントリのトンネル内に進入せしめて断層像を得るように
した装置において、前記ガントリはトンネルの進入側の
シールドコリメータを除き、かつ前記固定上板と補助板
の少なくともいずれか一方をシールドコリメータとして
作用するようにγ線吸収材で構成してなることを特徴と
するポジトロンＣＴ装置の動物固定装置。(1) The animal to be examined is seated on the lower fixed plate, the neck part is narrowed and fixed between the upper fixed plate and the auxiliary plate, and the head is inserted into the tunnel of the gantry to obtain a tomographic image. In the apparatus, the gantry is characterized in that, except for a shield collimator on the entrance side of the tunnel, at least one of the fixed upper plate and the auxiliary plate is made of a γ-ray absorbing material so as to act as a shield collimator. An animal fixation device for positron CT equipment.
切欠を形成し、この切欠によって被検体の首部分を狭み
つけるようにした請求項（１）記載のポジトロンＣＴ装
置の動物固定装置。(2) The animal fixation device for a positron CT apparatus according to claim (1), wherein cutouts are formed in the fixation upper plate and the auxiliary plate from different directions, respectively, and the neck portion of the subject is narrowed by the cutouts.
鉛、タングステンまたはこれらの合金からなる請求項（
１）または（２）記載のポジトロンＣＴ装置の動物固定
装置。(3) At least one of the fixed upper plate and the auxiliary plate,
Claims consisting of lead, tungsten or their alloys (
An animal fixation device for a positron CT device according to 1) or (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13716389A JPH0641977B2 (en) | 1989-05-30 | 1989-05-30 | Animal fixing device for positron CT device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13716389A JPH0641977B2 (en) | 1989-05-30 | 1989-05-30 | Animal fixing device for positron CT device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH032584A true JPH032584A (en) | 1991-01-08 |
| JPH0641977B2 JPH0641977B2 (en) | 1994-06-01 |
Family
ID=15192293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13716389A Expired - Lifetime JPH0641977B2 (en) | 1989-05-30 | 1989-05-30 | Animal fixing device for positron CT device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641977B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168514A (en) * | 1991-09-27 | 1992-12-01 | Board Of Regents, The University Of Texas System | Modular radiotherapy treatment chair and methods of treatment |
| WO2003007807A1 (en) * | 2001-07-10 | 2003-01-30 | Santen Pharmaceutical Co., Ltd. | Monkey visual field measurement system and visual field measurement method |
| JP2007218768A (en) * | 2006-02-17 | 2007-08-30 | Shimadzu Corp | Positron emission tomography equipment |
| KR100935332B1 (en) * | 2009-08-31 | 2010-01-06 | 계룡과학주식회사 | Primate for treatment of human excretion device |
| JP2012503197A (en) * | 2008-09-19 | 2012-02-02 | ジェファソン サイエンス アソシエーツ リミテッド ライアビリティ カンパニー | Compact and mobile high resolution PET brain imager |
| JP2013092453A (en) * | 2011-10-26 | 2013-05-16 | Shimadzu Corp | Radiographic device for breast medical examination |
-
1989
- 1989-05-30 JP JP13716389A patent/JPH0641977B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168514A (en) * | 1991-09-27 | 1992-12-01 | Board Of Regents, The University Of Texas System | Modular radiotherapy treatment chair and methods of treatment |
| WO2003007807A1 (en) * | 2001-07-10 | 2003-01-30 | Santen Pharmaceutical Co., Ltd. | Monkey visual field measurement system and visual field measurement method |
| US7422326B2 (en) | 2001-07-10 | 2008-09-09 | Santen Pharmaeutical Co., Ltd. | Monkey visual field measurement system and visual field measurement method |
| JP2007218768A (en) * | 2006-02-17 | 2007-08-30 | Shimadzu Corp | Positron emission tomography equipment |
| JP2012503197A (en) * | 2008-09-19 | 2012-02-02 | ジェファソン サイエンス アソシエーツ リミテッド ライアビリティ カンパニー | Compact and mobile high resolution PET brain imager |
| KR100935332B1 (en) * | 2009-08-31 | 2010-01-06 | 계룡과학주식회사 | Primate for treatment of human excretion device |
| JP2013092453A (en) * | 2011-10-26 | 2013-05-16 | Shimadzu Corp | Radiographic device for breast medical examination |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0641977B2 (en) | 1994-06-01 |
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