JP2009053026A - Nuclear medicine device - Google Patents

Nuclear medicine device Download PDF

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JP2009053026A
JP2009053026A JP2007219882A JP2007219882A JP2009053026A JP 2009053026 A JP2009053026 A JP 2009053026A JP 2007219882 A JP2007219882 A JP 2007219882A JP 2007219882 A JP2007219882 A JP 2007219882A JP 2009053026 A JP2009053026 A JP 2009053026A
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radiation source
gantry
nuclear medicine
medicine apparatus
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JP4737164B2 (en
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Keiji Kitamura
圭司 北村
Hiroshi Muraoka
寛 村岡
Yuji Iwata
祐士 岩田
Kimiharu Shimizu
公治 清水
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Shimadzu Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To facilitate access to a subject while sufficiently avoiding contact of a radiation source to the subject. <P>SOLUTION: A gantry 3 is disposed on a base; a donut-like rotator 7 is rotatably disposed in the insertion/desorption direction of the subject or about the axial core parallel to it on a rotator support 6 that has a hollow section and is disposed on the opposite side of the gantry 3 to the insertion/desorption side of the subject, and the radiation source 5 is attached to the rotator 7 integrally rotatably via a radiation source supporting member 8. A cylindrical cover 11 is disposed on the inner side of the radiation source 5 in the gantry 3 in a cantilever support state from the insertion/desorption side of the subject of the gantry 3 so as to prevent the contact of the radiation source 5 with the subject, and the opposite side of the cylindrical cover 11 to the insertion/desorption side of the subject is inserted in the inner space of the rotator 7 and is integrally supported by a cover supporting member 12 supported by the base. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、実験用小動物などの被写体を挿入・離脱する中空部を有するガントリに周方向全周に分散して、被写体内から放射される光子を検出する光子検出手段を多数設け、ガントリの内方に、被写体の光子透過率を測定するための放射線源をガントリの周方向に移動可能に設けた核医学装置に関する。   The present invention is provided with a large number of photon detection means for detecting photons emitted from within a subject dispersed in the entire circumference in a gantry having a hollow portion through which a subject such as an experimental small animal is inserted and removed. On the other hand, the present invention relates to a nuclear medicine apparatus in which a radiation source for measuring the photon transmittance of a subject is provided so as to be movable in the circumferential direction of the gantry.

この種の核医学装置では、被写体内に投入された放射線源である陽電子放出核種から放出される光子を光子検出手段で同時計数によって検出し、その放射線源の分布を画像化している。
ところが、光子検出手段で検出される光子は、被写体内の放射線源から放出されるものであるために、光子が体外に出てくるまでの間に被写体内で吸収され、同時計数によって得られる放射線源の分布に正確さを欠く不都合がある。
このような問題を解決するために、放射線源を投入しない状態の被写体の周囲で放射線源を回転させ、被写体の光子透過率を測定し、その光子透過率によって同時計数データの補正を行うようにしている（特許文献１参照、図１１）。
特開２００６−１７７７９９号公報 In this type of nuclear medicine apparatus, photons emitted from a positron emitting nuclide, which is a radiation source injected into the subject, are detected by photon detection means by simultaneous counting, and the distribution of the radiation source is imaged.
However, since the photons detected by the photon detection means are emitted from a radiation source in the subject, the photons are absorbed in the subject before the photon comes out of the body and are obtained by simultaneous counting. There is a disadvantage that the distribution of the source lacks accuracy.
In order to solve such a problem, the radiation source is rotated around the subject in a state where the radiation source is not input, the photon transmittance of the subject is measured, and the coincidence data is corrected by the photon transmittance. (See Patent Document 1 and FIG. 11).
JP 2006-177799 A

しかしながら、上述従来例の場合に、次のような課題があった。
放射線源が被写体の周りを直接回転するため、その回転する放射線源が被写体や被写体に取り付けたチューブなどに接触する不都合があった。
また、放射線源との接触を回避するために、被写体の位置決めに手間を要する不都合があった。 However, the above-described conventional example has the following problems.
Since the radiation source rotates directly around the subject, there is a disadvantage that the rotating radiation source contacts the subject or a tube attached to the subject.
In addition, in order to avoid contact with the radiation source, there is a problem that it takes time to position the subject.

このような不都合を回避するために、放射線源をドーナツ状の回転体に取り付けるとともに、放射線源および回転体、ならびに、回転体を回転駆動する機構の全体を、回転体の回転軸芯方向に長い二重構造のガントリ内に設けたものもあるが、被写体に対する麻酔装置のセットやその麻酔用の注射器の位置決めや修正などといった被写体に対するアクセスを行いづらくなる不都合があった。   In order to avoid such inconvenience, the radiation source is attached to the donut-shaped rotating body, and the radiation source, the rotating body, and the entire mechanism for rotationally driving the rotating body are long in the direction of the rotation axis of the rotating body. Some are provided in a dual-structure gantry, but there is a disadvantage that it is difficult to access the subject such as setting of an anesthesia apparatus for the subject and positioning and correction of the syringe for anesthesia.

この発明は、上述のような事情に鑑みてなされたものであって、放射線源が被写体に接触することを良好に回避できるものでありながら、被写体に対するアクセスを容易に行いやすくできるようにすることを目的とする。   The present invention has been made in view of the circumstances as described above, and is capable of easily avoiding a radiation source from coming into contact with a subject while making it easy to access the subject. With the goal.

請求項１に係る発明は、上述のような目的を達成するために、次のような構成をとる。
すなわち、被写体を挿入・離脱する中空部を有するガントリと、前記ガントリに周方向全周に分散して多数設けられて被写体内から放射される光子を検出する光子検出手段と、前記ガントリの内方で前記ガントリの周方向に移動可能に設けられて被写体の光子透過率を測定するための放射線源と、を備えた核医学装置において、
前記ガントリの被写体を挿入・離脱する側とは反対側に、被写体の挿入・離脱方向またはそれと平行な軸心周りで回転可能にドーナツ状の回転体を設け、前記放射線源を前記回転体に線源支持部材を介して一体回転可能に取り付け、前記ガントリ内の前記放射線源よりも内方側に、前記放射線源と被写体との接触を防止可能に、前記ガントリの被写体の挿入・離脱側からの片持ち支持状態で円筒カバーを設けるとともに、前記円筒カバーの被写体の挿入・離脱側とは反対側を、前記回転体の内部空間を通すとともに固定部材に支持されたカバー支持部材で支持するように構成してあることを特徴としている。 The invention according to claim 1 has the following configuration in order to achieve the above-described object.
That is, a gantry having a hollow portion for inserting / removing a subject, a photon detection means for detecting a number of photons radiated from within the subject, distributed in the circumferential direction of the gantry, and an inner side of the gantry In a nuclear medicine apparatus comprising: a radiation source that is movably provided in the circumferential direction of the gantry for measuring the photon transmittance of a subject,
A donut-shaped rotator is provided on the opposite side of the gantry from the side on which the subject is inserted / removed so as to be rotatable about the direction of insertion / removal of the subject or an axis parallel thereto, and the radiation source is connected to the rotator. It is attached so as to be integrally rotatable via a source support member, and it is possible to prevent contact between the radiation source and the subject on the inner side of the radiation source in the gantry. A cylindrical cover is provided in a cantilevered state, and the opposite side of the cylindrical cover from the subject insertion / removal side is supported by a cover support member that passes through the internal space of the rotating body and is supported by a fixed member. It is characterized by being configured.

（作用・効果）
請求項１に係る発明の核医学装置の構成によれば、放射線源と被写体との接触を防止する円筒カバーを、ガントリの被写体の挿入・離脱側からは片持ち支持させながらも、その円筒カバーの被写体の挿入・離脱側とは反対側を、回転体の内部空間を通すとともに固定部材に支持されたカバー支持部材で支持する。
したがって、円筒カバーの被写体の挿入・離脱方向の両側を支持するから、円筒カバーを変形させたりすることなく良好に支持でき、しかも、被写体に対する麻酔装置のセットやその麻酔用の注射器の位置決めや修正などといった被写体に対するアクセスをガントリと回転体との間からも行うことができ、放射線源が被写体に接触することを良好に回避できるものでありながら、被写体に対するアクセスが行いやすくなった。 (Action / Effect)
According to the configuration of the nuclear medicine apparatus of the first aspect of the present invention, the cylindrical cover that prevents contact between the radiation source and the subject is cantilevered from the insertion / removal side of the subject of the gantry while the cylindrical cover is supported. The side opposite to the insertion / removal side of the subject is passed through the internal space of the rotating body and supported by a cover support member supported by the fixed member.
Therefore, since both sides of the cylindrical cover in the insertion / removal direction of the subject are supported, the cylindrical cover can be favorably supported without being deformed, and the anesthesia device set and the anesthetic syringe for the subject are positioned and corrected. The object can be accessed from between the gantry and the rotator, and the object can be easily accessed while the radiation source can be well avoided.

また、請求項２に係る発明は、
請求項１に記載の核医学装置において、
カバー支持部材に放射線源をシールドするシールド部材を設け、前記放射線源を使用位置と前記シールド部材によるシールド位置とにわたって変位する線源移動機構を設けて構成する。 The invention according to claim 2
The nuclear medicine apparatus according to claim 1,
The cover support member is provided with a shield member that shields the radiation source, and a radiation source moving mechanism that displaces the radiation source over a use position and a shield position by the shield member is provided.

（作用・効果）
請求項２に係る発明の核医学装置の構成によれば、放射線源を使用しないときには、シールド部材によるシールド位置に変位させてシールドするから安全性を向上できる。 (Action / Effect)
According to the configuration of the nuclear medicine apparatus of the invention according to claim 2, when the radiation source is not used, the safety can be improved because the radiation source is displaced and shielded by the shield member.

また、請求項３に係る発明は、
請求項１または２に記載の核医学装置において、
円筒カバーの外周面に放射線源の周方向への移動を案内するスパイラルガイドを付設して構成する。 The invention according to claim 3
The nuclear medicine apparatus according to claim 1 or 2,
A spiral guide for guiding the movement of the radiation source in the circumferential direction is attached to the outer peripheral surface of the cylindrical cover.

（作用・効果）
請求項３に係る発明の核医学装置の構成によれば、放射線源を円筒カバーの筒軸心方向に移動するに伴い、スパイラルガイドの案内により放射線源を円筒カバーの周方向に、すなわち、ガントリの周方向に移動できるから、放射線源を回転駆動するための機構を不要にできるとともに、その位置精度を向上できる。 (Action / Effect)
According to the configuration of the nuclear medicine apparatus of the invention according to claim 3, as the radiation source is moved in the cylinder axial direction of the cylindrical cover, the radiation source is guided in the circumferential direction of the cylindrical cover by the guide of the spiral guide, that is, the gantry. Therefore, a mechanism for rotationally driving the radiation source can be eliminated, and the positional accuracy can be improved.

請求項１に係る発明の核医学装置の構成によれば、放射線源と被写体との接触を防止する円筒カバーを、ガントリの被写体の挿入・離脱側からは片持ち支持させながらも、その円筒カバーの被写体の挿入・離脱側とは反対側を、回転体の内部空間を通すとともに固定部材に支持されたカバー支持部材で支持する。
したがって、円筒カバーの被写体の挿入・離脱方向の両側を支持するから、円筒カバーを変形させたりすることなく良好に支持でき、しかも、被写体に対する麻酔装置のセットやその麻酔用の注射器の位置決めや修正などといった被写体に対するアクセスをガントリと回転体との間からも行うことができ、放射線源が被写体に接触することを良好に回避できるものでありながら、被写体に対するアクセスが行いやすくなった。 According to the configuration of the nuclear medicine apparatus of the first aspect of the present invention, the cylindrical cover that prevents contact between the radiation source and the subject is cantilevered from the insertion / removal side of the subject of the gantry while the cylindrical cover is supported. The side opposite to the insertion / removal side of the subject is passed through the internal space of the rotating body and supported by a cover support member supported by the fixed member.
Therefore, since both sides of the cylindrical cover in the insertion / removal direction of the subject are supported, the cylindrical cover can be favorably supported without being deformed, and the anesthesia device set for the subject and the positioning and correction of the syringe for anesthesia are performed. The object can be accessed from between the gantry and the rotator, and the object can be easily accessed while the radiation source can be well avoided.

次に、この発明の実施例について、図面に基づいて詳細に説明する。   Next, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、この発明に係る核医学装置の実施例１の一部破断全体側面図、図２は要部の拡大断面図、図３は要部の横断面図であり、基台１上に、実験用小動物などの被写体Ｈを搭載する天板２が水平方向に移動可能に設けられている。
また、基台１上には、天板２の水平移動によって被写体Ｈを挿入・離脱する中空部Ｓを有するガントリ３が設けられている。 1 is a partially cutaway side view of Example 1 of a nuclear medicine apparatus according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part, and FIG. 3 is a cross-sectional view of the main part. A top plate 2 on which a subject H such as an experimental small animal is mounted is provided so as to be movable in the horizontal direction.
A gantry 3 having a hollow portion S through which the subject H is inserted and removed by horizontal movement of the top plate 2 is provided on the base 1.

ガントリ３には、被写体Ｈ内から放射される光子や後述する放射線源から放射されて被写体Ｈを透過した光子などを検出する光子検出手段としてのシンチレータ４が周方向全周に分散して多数設けられている。
ガントリ３の内方には、被写体Ｈの光子透過率を測定するためのＧｅ−Ｇａなどの放射線源５がガントリ３の周方向に移動可能に設けられている。 The gantry 3 is provided with a large number of scintillators 4 serving as photon detecting means for detecting photons emitted from within the subject H or photons emitted from a radiation source, which will be described later, and transmitted through the subject H. It has been.
Inside the gantry 3, a radiation source 5 such as Ge—Ga for measuring the photon transmittance of the subject H is provided so as to be movable in the circumferential direction of the gantry 3.

ガントリ３の被写体Ｈを挿入・離脱する側とは反対側において、基台１上に、線源移動機構（図示せず）を介して被写体Ｈを挿入・離脱する水平方向に移動可能に、中空部を有する回転体支持台６が設けられている。線源移動機構としては、例えば、電動モータによって駆動回転されるネジ軸に回転体支持台６の下部を螺合させる構成などが採用される。  On the opposite side of the gantry 3 from the side on which the subject H is inserted / removed, it is hollow on the base 1 so as to be movable in the horizontal direction where the subject H is inserted / removed via a radiation source moving mechanism (not shown). A rotating body support 6 having a portion is provided. As the radiation source moving mechanism, for example, a configuration in which a lower part of the rotating body support base 6 is screwed to a screw shaft driven and rotated by an electric motor is adopted.

回転体支持台６に、被写体Ｈの挿入・離脱方向またはそれと平行な軸心周りで回転可能に内部空間を有するドーナツ状の回転体７が設けられるとともに、その回転体７に線源支持部材８を介して一体回転可能に放射線源５が取り付けられている。回転体支持台６に電動モータ９が設けられ、その電動モータ９と回転体７とがベルト式伝動機構１０を介して連動連結され、回転体７を駆動回転できるように構成されている。    The rotator support 6 is provided with a donut-shaped rotator 7 having an internal space so as to be rotatable around an axis parallel to the insertion / removal direction of the subject H, and the radiation source support member 8 is provided on the rotator 7. The radiation source 5 is attached so as to be able to rotate integrally therewith. An electric motor 9 is provided on the rotating body support base 6, and the electric motor 9 and the rotating body 7 are interlocked and connected via a belt-type transmission mechanism 10 so that the rotating body 7 can be driven and rotated.

ガントリ３内の放射線源５よりも内方側に、放射線源５と被写体Ｈとの接触を防止可能に、ガントリ３の被写体の挿入・離脱側からの片持ち支持状態で円筒カバー１１が設けられている。円筒カバー１１の被写体Ｈの挿入・離脱側とは反対側が、回転体７の内部空間を通すとともに基台１に支持されたカバー支持部材１２で一体的に支持されている。  A cylindrical cover 11 is provided on the inner side of the radiation source 5 in the gantry 3 in a cantilevered state from the insertion / removal side of the subject of the gantry 3 so as to prevent contact between the radiation source 5 and the subject H. ing. The side opposite to the insertion / removal side of the subject H of the cylindrical cover 11 is integrally supported by a cover support member 12 that passes through the internal space of the rotating body 7 and is supported by the base 1.

シンチレータ４には、同時計数手段１３と透過率算出手段１４とが接続され、同時計数手段１３に投影データ収集手段１５が接続されるとともに投影データ収集手段１５に吸収補正手段１６が接続されている。透過率算出手段１４が吸収補正手段１６に接続されるとともに、吸収補正手段１６に画像再構成手段１７が接続され、画像再構成手段１７にモニタ１８が接続されている。   The scintillator 4 is connected to a coincidence counting means 13 and a transmittance calculating means 14, a projection data collecting means 15 is connected to the coincidence counting means 13, and an absorption correction means 16 is connected to the projection data collecting means 15. . The transmittance calculation unit 14 is connected to the absorption correction unit 16, the image reconstruction unit 17 is connected to the absorption correction unit 16, and the monitor 18 is connected to the image reconstruction unit 17.

透過率算出手段１４では、被写体Ｈ内に放射線源である陽電子放出核種を投入しない状態で放射線源５を被写体Ｈの周囲で回転させたときに、被写体Ｈを透過した光子をシンチレータ４で検出し、その検出結果に基づいて被写体Ｈの各位相ごとの光子透過率を算出するようになっている。
同時計数手段１３では、被写体Ｈ内に放射線源である陽電子放出核種を投入した状態で、その被写体Ｈ内の放射線源から外部に放射される光子をシンチレータ４で検出し、その同時計数データを取得するようになっている。 In the transmittance calculation means 14, when the radiation source 5 is rotated around the subject H with no positron emitting nuclide as a radiation source in the subject H, the scintillator 4 detects photons transmitted through the subject H. The photon transmittance for each phase of the subject H is calculated based on the detection result.
The coincidence means 13 detects photons emitted from the radiation source in the subject H with the scintillator 4 in a state where the positron emitting nuclide as a radiation source is inserted into the subject H, and obtains coincidence data. It is supposed to be.

投影データ収集手段１５では、同時計数手段１３で取得した同時計数データを蓄積し、投影データを生成して収集するようになっている。
吸収補正手段１６では、透過率算出手段１４で算出された透過率に基づいて、特定位相ごとの投影データについての吸収補正を行って補正投影データを取得するようになっている。
画像再構成手段１７では、吸収補正手段１６で取得された補正投影データに基づいて画像再構成を行い、その画像をモニタ１８で表示できるようになっている。 The projection data collection unit 15 accumulates the coincidence data acquired by the coincidence unit 13 and generates and collects projection data.
Based on the transmittance calculated by the transmittance calculating unit 14, the absorption correcting unit 16 performs the absorption correction on the projection data for each specific phase to obtain corrected projection data.
The image reconstruction means 17 can perform image reconstruction based on the corrected projection data acquired by the absorption correction means 16 and display the image on the monitor 18.

カバー支持部材１２上にＣＣＤカメラ１９が設けられ、そのＣＣＤカメラ１９がモニタ１８に接続され、ガントリ３内の被写体Ｈの状態を観察できるように構成されている。   A CCD camera 19 is provided on the cover support member 12, and the CCD camera 19 is connected to a monitor 18 so that the state of the subject H in the gantry 3 can be observed.

図４は、この発明に係る核医学装置の実施例２の要部の拡大断面図であり、実施例１と異なるところは、次の通りである。
すなわち、放射線源５がタングステン合金製の保持部材２１内に収容されるとともに、保持部材２１の円筒カバー１１側を向いた面に、放射用開口２２が形成され、保持部材２１が線源支持部材８に取り付けられている。 FIG. 4 is an enlarged cross-sectional view of the main part of the second embodiment of the nuclear medicine apparatus according to the present invention. The differences from the first embodiment are as follows.
That is, the radiation source 5 is accommodated in a holding member 21 made of tungsten alloy, and a radiation opening 22 is formed on the surface of the holding member 21 facing the cylindrical cover 11 side. The holding member 21 is a radiation source support member. 8 is attached.

カバー支持部材１２のガントリ３の横側部に、タングステン合金製のシールド部材２３が設けられ、回転体支持台６の移動と回転体７の回転との協働により、保持部材２１を使用位置とシールド位置とにわたって変位させ、シールド位置において、図５の要部の断面図に示すように、放射用開口２２をシールド部材２３によって蓋し、安全性を向上できるように構成されている。他の構成は実施例１と同じであり、同一図番を付すことにより、その説明は省略する。
保持部材２１やシールド部材２３としては鉛製にしても良い。 A shield member 23 made of tungsten alloy is provided on the lateral side portion of the gantry 3 of the cover support member 12, and the holding member 21 is moved to the use position by cooperation of the movement of the rotating body support base 6 and the rotation of the rotating body 7. As shown in the cross-sectional view of the main part of FIG. 5, the radiation opening 22 is covered with the shield member 23 at the shield position so that the safety can be improved. Other configurations are the same as those of the first embodiment, and the description thereof is omitted by assigning the same reference numerals.
The holding member 21 and the shield member 23 may be made of lead.

図６は、この発明に係る核医学装置の実施例３の要部の拡大断面図、図７は円筒カバーの外周面の展開図であり、実施例１と異なるところは、次の通りである。
すなわち、円筒カバー１１の外周面に、放射線源５を保持する保持部材２１の周方向への移動を案内するようにスパイラルガイド３１が付設され、電動モータ９およびベルト式伝動機構１０が無くされている。他の構成は実施例１と同じであり、同一図番を付すことにより、その説明は省略する。 FIG. 6 is an enlarged cross-sectional view of the main part of the third embodiment of the nuclear medicine apparatus according to the present invention, FIG. 7 is a development view of the outer peripheral surface of the cylindrical cover, and the differences from the first embodiment are as follows. .
That is, the spiral guide 31 is attached to the outer peripheral surface of the cylindrical cover 11 so as to guide the movement of the holding member 21 holding the radiation source 5 in the circumferential direction, and the electric motor 9 and the belt type transmission mechanism 10 are eliminated. Yes. Other configurations are the same as those of the first embodiment, and the description thereof is omitted by assigning the same reference numerals.

この実施例３によれば、回転体支持台６を水平方向に駆動移動することにより、スプライドガイド３１により保持部材２１に回転力を付与して回転体７を回転させ、放射線源５をガントリ３の周方向に回転させることができ、回転のための駆動機構を不要にできるとともに位置制度を向上できる利点を有している。   According to the third embodiment, the rotating body support 6 is driven and moved in the horizontal direction, whereby the rotating member 7 is rotated by applying a rotational force to the holding member 21 by the spride guide 31 and the radiation source 5 is moved to the gantry. 3 can be rotated in the circumferential direction, and there is an advantage that a driving mechanism for rotation can be made unnecessary and the position system can be improved.

上記実施例では、放射線源５を被写体Ｈの挿入・離脱方向に移動させる線源移動機構を構成するのに、回転体７を支持する回転体支持台６を移動するように構成しているが、例えば、線源支持部材８を回転体支持台６に対して移動させるとか線源支持部材８を伸縮可能に構成するなどして放射線源５を被写体Ｈの挿入・離脱方向に移動させるように構成しても良く、その場合であれば、カバー支持部材１２を回転体支持台６に支持させれば良く、基台１や回転体支持台６などをして固定部材と総称する。   In the above embodiment, the radiation source moving mechanism for moving the radiation source 5 in the insertion / removal direction of the subject H is configured to move the rotating body support 6 that supports the rotating body 7. For example, the radiation source 5 is moved in the insertion / removal direction of the subject H by moving the radiation source support member 8 relative to the rotator support base 6 or by configuring the radiation source support member 8 to be extendable / contractable. In this case, the cover support member 12 may be supported by the rotating body support base 6, and the base 1, the rotating body support base 6 and the like are collectively referred to as a fixing member.

上記実施例では、回転体７を駆動回転するのに、ベルト式伝動機構１０を採用しているが、ギア式伝動機構など各種の伝動機構が適用可能である。
また、上記実施例ではカバー支持部材１２を１本設けているが、例えば、円筒カバー１１の周方向に３本など複数本設けても良い。 In the above-described embodiment, the belt-type transmission mechanism 10 is employed to drive and rotate the rotating body 7, but various transmission mechanisms such as a gear-type transmission mechanism are applicable.
In the above embodiment, one cover support member 12 is provided. However, for example, a plurality of cover support members 12 such as three may be provided in the circumferential direction of the cylindrical cover 11.

この発明に係る核医学装置の実施例１の一部破断全体側面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a partially broken whole side view of Example 1 of the nuclear medicine apparatus which concerns on this invention. 要部の拡大断面図である。It is an expanded sectional view of the principal part. 要部の横断面図である。It is a cross-sectional view of the main part. この発明に係る核医学装置の実施例２の要部の拡大断面図である。It is an expanded sectional view of the principal part of Example 2 of the nuclear medicine apparatus which concerns on this invention. 要部の拡大断面図である。It is an expanded sectional view of the principal part. この発明に係る核医学装置の実施例３の要部の拡大断面図である。It is an expanded sectional view of the principal part of Example 3 of the nuclear medicine apparatus concerning this invention. 円筒カバーの外周面の展開図である。It is an expanded view of the outer peripheral surface of a cylindrical cover.

符号の説明Explanation of symbols

１…基台（固定部材）
３…ガントリ
４…シンチレータ（光子検出手段）
５…放射線源
７…回転体
８…線源支持部材
１１…円筒カバー
１２…カバー支持部材
２３…シールド部材
３１…スパイラルガイド
Ｈ…被写体 1 ... Base (fixing member)
3 ... Gantry 4 ... Scintillator (photon detection means)
DESCRIPTION OF SYMBOLS 5 ... Radiation source 7 ... Rotating body 8 ... Radiation source support member 11 ... Cylindrical cover 12 ... Cover support member 23 ... Shield member 31 ... Spiral guide H ... Subject

Claims (3)

被写体を挿入・離脱する中空部を有するガントリと、前記ガントリに周方向全周に分散して多数設けられて被写体内から放射される光子を検出する光子検出手段と、前記ガントリの内方で前記ガントリの周方向に移動可能に設けられて被写体の光子透過率を測定するための放射線源と、を備えた核医学装置において、
前記ガントリの被写体を挿入・離脱する側とは反対側に、被写体の挿入・離脱方向またはそれと平行な軸心周りで回転可能にドーナツ状の回転体を設け、前記放射線源を前記回転体に線源支持部材を介して一体回転可能に取り付け、前記ガントリ内の前記放射線源よりも内方側に、前記放射線源と被写体との接触を防止可能に、前記ガントリの被写体の挿入・離脱側からの片持ち支持状態で円筒カバーを設けるとともに、前記円筒カバーの被写体の挿入・離脱側とは反対側を、前記回転体の内部空間を通すとともに固定部材に支持されたカバー支持部材で支持するように構成してあることを特徴とする核医学装置。 A gantry having a hollow portion for inserting / removing a subject; and a photon detecting means for detecting photons emitted from the subject provided in a large number distributed in the circumferential direction of the gantry; In a nuclear medicine apparatus comprising: a radiation source provided so as to be movable in a circumferential direction of a gantry and measuring a photon transmittance of a subject.
A donut-shaped rotator is provided on the opposite side of the gantry from the side on which the subject is inserted / removed so as to be rotatable about the direction of insertion / removal of the subject or an axis parallel thereto, and the radiation source is connected to the rotator. It is attached so as to be integrally rotatable via a source support member, and it is possible to prevent contact between the radiation source and the subject on the inner side of the radiation source in the gantry. A cylindrical cover is provided in a cantilevered state, and the opposite side of the cylindrical cover from the subject insertion / removal side is supported by a cover support member that passes through the internal space of the rotating body and is supported by a fixed member. A nuclear medicine apparatus characterized by being configured. 請求項１に記載の核医学装置において、
カバー支持部材に放射線源をシールドするシールド部材を設け、前記放射線源を使用位置と前記シールド部材によるシールド位置とにわたって変位する線源移動機構を設けてある核医学装置。 The nuclear medicine apparatus according to claim 1,
A nuclear medicine apparatus in which a shield member that shields a radiation source is provided on a cover support member, and a radiation source moving mechanism that displaces the radiation source over a use position and a shield position by the shield member. 請求項１または２に記載の核医学装置において、
円筒カバーの外周面に放射線源の周方向への移動を案内するスパイラルガイドを付設してある核医学装置。 The nuclear medicine apparatus according to claim 1 or 2,
A nuclear medicine apparatus in which a spiral guide for guiding movement of a radiation source in a circumferential direction is attached to an outer peripheral surface of a cylindrical cover.
JP2007219882A 2007-08-27 2007-08-27 Nuclear medicine equipment Expired - Fee Related JP4737164B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109188490A (en) * 2018-09-21 2019-01-11 江南大学 A kind of semienclosed core detection delivery device of rotation

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Publication number Priority date Publication date Assignee Title
JPH0199077A (en) * 1987-10-12 1989-04-17 Showa Electric Wire & Cable Co Ltd Production of thermal fixing roller
JP2007178364A (en) * 2005-12-28 2007-07-12 Hitachi Ltd Nuclear medicine diagnostic equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0199077A (en) * 1987-10-12 1989-04-17 Showa Electric Wire & Cable Co Ltd Production of thermal fixing roller
JP2007178364A (en) * 2005-12-28 2007-07-12 Hitachi Ltd Nuclear medicine diagnostic equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109188490A (en) * 2018-09-21 2019-01-11 江南大学 A kind of semienclosed core detection delivery device of rotation
CN109188490B (en) * 2018-09-21 2022-08-12 江南大学 Rotary semi-closed nuclear detection throwing device

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