JP4861240B2 - Body surface monitor - Google Patents

Body surface monitor Download PDF

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JP4861240B2
JP4861240B2 JP2007117112A JP2007117112A JP4861240B2 JP 4861240 B2 JP4861240 B2 JP 4861240B2 JP 2007117112 A JP2007117112 A JP 2007117112A JP 2007117112 A JP2007117112 A JP 2007117112A JP 4861240 B2 JP4861240 B2 JP 4861240B2
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radiation detector
radiation
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temporal
detector
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JP2008275376A (en
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佑介 坪井
宏隆 酒井
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Toshiba Corp
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Description

本発明は、放射線取扱施設において使用される被検者の体表面の放射線汚染を計測するための体表面モニタに関する。   The present invention relates to a body surface monitor for measuring radiation contamination on a body surface of a subject used in a radiation handling facility.

一般に従来の体表面モニタは、被検者の前背面、側面側、頭部、側頭部の放射線汚染を測定するための放射線検出器をモニタ本体にそれぞれ固定設置し、これらの放射線検出器を用いて被検者の体表面に付着した放射性物質から放射される放射線を検出することにより、被検者の体表面の放射線汚染を測定する。特許文献1に、体表面モニタの従来例が示されている。特許文献1では、被検者の前面、背面、頭部上面の放射線汚染をそれぞれ測定する前面検出器、背面検出器、頭上検出器に加え、被検者の側頭部の放射性汚染を測定する側頭検出器を設けた構成の体表面モニタが提案されている。
特許第3100677号公報
In general, a conventional body surface monitor has radiation detectors for measuring radiation contamination on the front and back, side, head, and temporal regions of a subject fixedly installed on the monitor body, and these radiation detectors are installed. The radiation contamination of the body surface of the subject is measured by detecting the radiation emitted from the radioactive substance attached to the body surface of the subject. Patent Document 1 discloses a conventional example of a body surface monitor. In Patent Document 1, in addition to a front detector, a back detector, and an overhead detector that measure radiation contamination on the front surface, back surface, and top surface of the subject, respectively, radioactive contamination of the subject's temporal region is measured. A body surface monitor having a structure provided with a temporal detector has been proposed.
Japanese Patent No. 3100677

しかしながら、特許文献1の従来技術には、以下のような課題がある。   However, the conventional technique of Patent Document 1 has the following problems.

被検者の首部分、のど部分、顎部分などは、顔面や肩や胸面に対して凹型を形成しており、即ち、首部分、のど部分、顎部分などは、被検者の前面(正面)から見た場合、顔面や胸面の位置よりもさらに奥(背面側)に引込んだ位置に存在している。このため、首部分、のど部分、顎部分などは、前面検出器からの距離が顔面や胸面よりも遠くなり、これらの部分の放射線汚染を前面検出器で測定することが難しい。また、被検者の側面(側頭部側)から見た場合、首部分、のど部分、顎部分などは、側頭部よりも奥に引込んだ位置に存在している。このため、首部分、のど部分、顎部分などは、側頭検出器からの距離が側頭部よりも遠くなり、これらの部分の放射線汚染を側頭検出器で測定することが難しい。   The subject's neck, throat, chin, etc. are concave with respect to the face, shoulders, and chest, that is, the neck, throat, chin, etc. When viewed from the front, it is present at a position that is further pulled back (back side) than the face and chest positions. For this reason, the distance between the neck portion, the throat portion, the chin portion and the like from the front detector is farther than the face and chest surface, and it is difficult to measure the radiation contamination of these portions with the front detector. Further, when viewed from the side of the subject (the temporal side), the neck portion, the throat portion, the chin portion, and the like are present at a position that is retracted deeper than the temporal portion. For this reason, the neck portion, the throat portion, the chin portion, and the like are farther away from the temporal detector than the temporal detector, and it is difficult to measure the radiation contamination of these portions with the temporal detector.

また、首部分、のど部分、顎部分に付着した放射性物質から放射される放射線には、その放射方向が前面検出器の放射線測定面や側頭検出器の放射線測定面に向う方向でないものが含まれており、そのような方向の放射線は前面検出器や側頭検出器で測定することが難しい。例えば、下顎に付着した放射性物質から放射される放射線の放射方向は、下顎から地面へ向かう下方向となるため、前面検出器の放射線測定面や側頭検出器の放射線測定面には放射線が全く届かないか、もしも届いたとしても非常に微量であり、測定が難しい。   In addition, radiation emitted from radioactive materials attached to the neck, throat, and jaw includes those whose radiation direction is not directed toward the radiation measurement surface of the front detector or the temporal detector. Therefore, radiation in such a direction is difficult to measure with a front detector or a temporal detector. For example, the radiation direction of the radiation emitted from the radioactive material attached to the lower jaw is downward from the lower jaw toward the ground, so there is no radiation on the radiation measurement surface of the front detector or the radiation measurement surface of the temporal detector. If it does not reach or if it arrives, it is very small and difficult to measure.

このように、従来の体表面モニタでは、被検者の首部分、のど部分、顎部分の放射線汚染を測定することが困難という課題があった。   As described above, the conventional body surface monitor has a problem that it is difficult to measure radiation contamination of the neck, throat, and jaw of the subject.

本発明は上記従来技術の問題を解決するために提案するものであり、その目的は、被検者の首部分、のど部分、顎部分の放射線汚染を確実に測定できる体表面モニタを提供することにある。   The present invention proposes to solve the above-mentioned problems of the prior art, and an object thereof is to provide a body surface monitor that can reliably measure radiation contamination of the neck, throat, and jaw of a subject. It is in.

上記課題を解決するために、本発明の体表面モニタは、前面フレームと、前記前面フレームに設置された前面用放射線検出器と、前記前面フレームに開閉可能に設置された扉と、前記扉に設置された側面用放射線検出器と、後面フレームと、前記後面フレームに設置された後面用放射線検出器と、頭部用放射線検出器と、側頭用放射線検出器と、前記頭部用放射線検出器及び前記側頭用放射線検出器を上下方向に昇降可能に前記後面フレームに設置する昇降駆動機構とを備え、被検者の放射線汚染を測定する体表面モニタにおいて、前記頭部用放射線検出器の前記前面フレームに近い位置に配置され、前記被検者ののど部分、顎部分の少なくとも一箇所に近接した測定位置に移動可能な、前記のど部分、顎部分の少なくとも一箇所の放射線汚染を測定する放射線検出器を更に備えることを特徴とする。 In order to solve the above problems, a body surface monitor according to the present invention includes a front frame, a front radiation detector installed on the front frame, a door installed on the front frame so as to be opened and closed, and a door. Side radiation detector installed, rear frame, rear radiation detector installed on the rear frame, head radiation detector, temporal radiation detector, and head radiation detection A body surface monitor that measures radiation contamination of a subject, and a head drive radiation detector. is disposed in a position closer to the front frame, the throat portion of the subject, which is movable in a measuring position close to at least one portion of the jaw portion, said throat portion, radiation fouling of at least one portion of the jaw portion And further comprising a radiation detector to measure.

本発明によれば、被検者の首部分、のど部分、顎部分の少なくとも一箇所の放射線汚染を確実に測定できる。   According to the present invention, it is possible to reliably measure radiation contamination in at least one of the neck portion, throat portion, and chin portion of a subject.

以下、図面を参照して、本発明の実施形態について説明する。   Embodiments of the present invention will be described below with reference to the drawings.

(第1の実施形態)
先ず、図1〜図4を用いて本発明の体表面モニタの第1の実施形態を説明する。
(First embodiment)
First, the first embodiment of the body surface monitor of the present invention will be described with reference to FIGS.

図1は、体表面モニタ100を正面から見たときの概観図である。図2は体表面モニタ100の測定室の内部の様子を示す図である。図2では、図1に示す前面フレーム1を透過して体表面モニタ100を正面から見た時の様子を示している。図3、4は、体表面モニタ100の駆動機構部25を示す図である。図3は、被検者200の放射線汚染の測定を行っていないときの駆動機構部25の状態(駆動機構部25が初期位置にある状態)を示している。図4は、被検者200の放射線汚染の測定を行っているときの駆動機構部25の状態(駆動機構部25が測定位置にある状態)を示している。   FIG. 1 is a general view when the body surface monitor 100 is viewed from the front. FIG. 2 is a diagram showing the inside of the measurement chamber of the body surface monitor 100. FIG. 2 shows a state when the body surface monitor 100 is viewed from the front through the front frame 1 shown in FIG. 3 and 4 are diagrams showing the drive mechanism unit 25 of the body surface monitor 100. FIG. FIG. 3 shows a state of the drive mechanism unit 25 (a state in which the drive mechanism unit 25 is in the initial position) when measurement of radiation contamination of the subject 200 is not performed. FIG. 4 shows a state of the drive mechanism unit 25 (a state in which the drive mechanism unit 25 is at the measurement position) when the radiation contamination of the subject 200 is being measured.

本発明の体表面モニタ100は、被検者200の放射線汚染を測定する検出器として、図1、2に示す各検出器、即ち、前面用放射線検出器2、右側面用放射線検出器3、左側面用放射線検出器4、右手用放射線検出器5、左手用放射線検出器6、右足用放射線検出器7、左足用放射線検出器8、後面用放射線検出器9、頭部用放射線検出器11、右側頭用放射線検出器12、左側頭用放射線検出器13を備えると共に、図3、4に示す首用放射線検出器16をさらに備えている。   The body surface monitor 100 of the present invention is a detector for measuring the radiation contamination of the subject 200, as shown in FIGS. 1 and 2, that is, the front-side radiation detector 2, the right-side radiation detector 3, Left side radiation detector 4, right hand radiation detector 5, left hand radiation detector 6, right foot radiation detector 7, left foot radiation detector 8, rear surface radiation detector 9, head radiation detector 11 In addition to the right-side temporal radiation detector 12 and the left-side temporal radiation detector 13, the apparatus further includes a neck radiation detector 16 shown in FIGS.

前面用放射線検出器2は、図1のように前面フレーム1に固定設置され、被検者200の体前面の放射線汚染を測定する。右側面用放射線検出器3は、前面フレーム1に開閉可能に設けられた一方の扉3aに設置され、当該扉3aが閉じられた状態で被検者200の右側面の放射線汚染を測定する。左側面用放射線検出器4は、前面フレーム1に開閉可能に設けられたもう一方の扉4aに設置され、当該扉4aが閉じられた状態で被検者200の左側面の放射線汚染を測定する。右手用放射線検出器5及び左手用放射線検出器6は、前面フレーム1に固定設置され、被検者200の右手及び左手の放射線汚染をそれぞれ測定する。右足用放射線検出器7及び左足用放射線検出器8は、体表面モニタ100の台座に固定設置されており、被検者200の右足及び左足の放射線汚染をそれぞれ測定する。   The front radiation detector 2 is fixedly installed on the front frame 1 as shown in FIG. 1, and measures radiation contamination on the front surface of the subject 200. The radiation detector 3 for the right side surface is installed on one door 3a provided on the front frame 1 so as to be openable and closable, and measures radiation contamination on the right side surface of the subject 200 with the door 3a closed. The left-side radiation detector 4 is installed on the other door 4a provided on the front frame 1 so as to be openable and closable, and measures radiation contamination on the left side surface of the subject 200 with the door 4a closed. . The right-hand radiation detector 5 and the left-hand radiation detector 6 are fixedly installed on the front frame 1 and measure radiation contamination of the right hand and the left hand of the subject 200, respectively. The radiation detector 7 for the right foot and the radiation detector 8 for the left foot are fixedly installed on the pedestal of the body surface monitor 100 and measure radiation contamination of the right foot and the left foot of the subject 200, respectively.

また、図2のように、後面用放射線検出器9は、後面フレーム10に固定設置され、被検者200の体後面の放射線汚染を測定する。頭部用放射線検出器11は、図示せぬ昇降駆動機構を介して後面フレーム10に対し上下方向に移動可能(昇降可能)に設置されており、被検者200の頭部位置に応じて昇降し、頭部の上面の放射線汚染を測定する。右側頭用放射線検出器12及び左側頭用放射線検出器13は、頭部用放射線検出器11の左右両側に各々設置されており、被検者200の右側頭及び左側頭の放射線汚染をそれぞれ測定する。   Further, as shown in FIG. 2, the rear radiation detector 9 is fixedly installed on the rear frame 10 and measures radiation contamination on the rear surface of the subject 200. The head radiation detector 11 is installed so as to be movable up and down (movable up and down) with respect to the rear frame 10 via an elevation drive mechanism (not shown), and is moved up and down according to the head position of the subject 200. And measure radiation contamination on the upper surface of the head. The right temporal radiation detector 12 and the left temporal radiation detector 13 are respectively installed on the left and right sides of the head radiation detector 11, and respectively measure the right and left temporal radiation contamination of the subject 200. To do.

なお、図1、2に示すように、前面フレーム1、後面フレーム2、2つの扉3a、4aにより体表面モニタ100の本体を構成しており、この本体内に被検者200を収容し放射線汚染を測定する測定室を形成する。   As shown in FIGS. 1 and 2, the main body of the body surface monitor 100 is constituted by the front frame 1, the rear frame 2, and the two doors 3a and 4a. Form a measurement chamber to measure contamination.

次に、右側頭用放射線検出器12、左側頭用放射線検出器13及び首用放射線検出器16を移動させる駆動機構部25について、図3、図4を参照しながら説明する。   Next, the drive mechanism unit 25 for moving the right temporal radiation detector 12, the left temporal radiation detector 13, and the neck radiation detector 16 will be described with reference to FIGS.

駆動機構部25は、右側頭用放射線検出器12及び左側頭用放射線検出器13を移動するための頭部検出器駆動用電動機14、この頭部検出器駆動用電動機14の駆動力をギヤを介して右側頭用放射線検出器12及び左側頭用放射線検出器13に伝え、これら右側頭用放射線検出器12及び左側頭用放射線検出器13を互いに同期させた状態で移動させるための側頭検出器連結用シャフト15、頭部用放射線検出器11に対して首用放射線検出器16を被検者200側に移動可能に保持する固定フレーム17と、この固定フレーム17にギヤを介して駆動力を伝え首用放射線検出器16を移動させる首用検出器駆動用電動機18を備えている。   The drive mechanism unit 25 has a head detector driving electric motor 14 for moving the right temporal radiation detector 12 and the left temporal radiation detector 13, and the driving force of the head detector driving electric motor 14 is geared. To the right temporal radiation detector 12 and the left temporal radiation detector 13, and the temporal detection for moving the right temporal radiation detector 12 and the left temporal radiation detector 13 in synchronization with each other. A fixed frame 17 that holds the neck radiation detector 16 movably toward the subject 200 with respect to the instrument connecting shaft 15 and the head radiation detector 11, and a driving force to the fixed frame 17 via a gear. And a neck detector driving motor 18 for moving the neck radiation detector 16.

右側頭用放射線検出器12及び左側頭用放射線検出器13は、頭部用放射線検出器11の被検者200の右側頭及び左側頭に近い位置にそれぞれ設置されている。   The right-side head radiation detector 12 and the left-side head radiation detector 13 are respectively installed at positions near the right and left heads of the subject 200 of the head radiation detector 11.

首用放射線検出器16は、固定フレーム17を介して、頭部用放射線検出器11の被検者200の顔面に近い部分(頭部用放射線検出器11の前面フレーム1に近い位置)に設置されている。また、首用放射線検出器16は、被検者200の首部分、のど部分、顎部分と対向する面である16aや16bに放射線測定面を有している。固定フレーム17は、被検者200の顔面の放射線汚染の測定を妨げないように、被検者200の顔面から前面用放射線検出器2への方向に放射される放射線を遮らない形状としている。   The neck radiation detector 16 is installed on the portion of the head radiation detector 11 close to the face of the subject 200 (position close to the front frame 1 of the head radiation detector 11) via the fixed frame 17. Has been. Further, the neck radiation detector 16 has a radiation measurement surface on 16a and 16b which are surfaces facing the neck portion, the throat portion, and the chin portion of the subject 200. The fixed frame 17 has a shape that does not block radiation emitted from the face of the subject 200 toward the front radiation detector 2 so as not to hinder measurement of radiation contamination on the face of the subject 200.

次に体表面モニタ100の放射線汚染測定時の動作を説明する。   Next, the operation of the body surface monitor 100 when measuring radiation contamination will be described.

放射線汚染を測定していないとき、右側頭用放射線検出器12及び左側頭用放射線検出器13、首用放射線検出器16は、側頭検出器駆動用電動機14、首用検出器駆動用電動機18によって、それぞれ図3に示す初期位置に設置されている。右側頭用放射線検出器12及び左側頭用放射線検出器13は平板形状をしており、その初期位置は、それぞれの放射線測定面が地面に対向する位置(被検者200の側頭部に対してはそれぞれの放射線測定面がほぼ垂直となる位置)である。頭部用放射線検出器11の初期位置は、固定フレーム7が地面に対してほぼ垂直なっている状態のときの位置である。   When radiation contamination is not measured, the right side radiation detector 12, the left side radiation detector 13, and the neck radiation detector 16 are the temporal detector driving motor 14 and the neck detector driving motor 18. Are installed at the initial positions shown in FIG. The right temporal radiation detector 12 and the left temporal radiation detector 13 have a flat plate shape, and their initial positions are positions where the respective radiation measurement surfaces face the ground (with respect to the temporal region of the subject 200). The position where each radiation measurement surface is almost vertical). The initial position of the head radiation detector 11 is a position when the fixed frame 7 is substantially perpendicular to the ground.

一方、放射線汚染の測定を行う場合、右側頭用放射線検出器12及び左側頭用放射線検出器13、首用放射線検出器16は、側頭検出器駆動用電動機14、首用検出器駆動用電動機18によって測定位置(図4に示される位置)に移動される。   On the other hand, when measuring radiation contamination, the right side radiation detector 12, the left side radiation detector 13, and the neck radiation detector 16 are the temporal detector driving motor 14, the neck detector driving motor. 18 is moved to the measurement position (position shown in FIG. 4).

ここで、被検者200が体表面モニタ100の測定室に入り、放射線汚染の測定を行うとき、図示しない昇降駆動機構により頭部用放射線検出器11を降下させて(図2のA方向)、被検者200の頭部の近接位置に移動させる。この頭部用放射線検出器11の下方向への移動と連動して、側頭検出器駆動用電動機14が、側頭検出器連結用シャフト15を介して右側頭用放射線検出器12及び左側頭用放射線検出器13を初期位置からC方向に同時に移動させ、測定位置に位置させる。これより、右側頭用放射線検出器12及び左側頭用放射線検出器13のそれぞれの放射線測定面が、被検者200の右側頭及び左側頭と対向し且つ近接した位置にそれぞれ配置されることとなる。この右側頭用放射線検出器12及び左側頭用放射線検出器13の移動と同時に、首用検出器駆動用電動機18が、固定フレーム17を介して首用放射線検出器16を初期位置からE方向に移動させ、測定位置に位置させる。これにより、首用放射線検出器16の放射線測定面16a、16bが被検者200の首部分、のど部分、顎部分に対向し且つ近接した位置にそれぞれ配置されることとなる。   Here, when the subject 200 enters the measurement room of the body surface monitor 100 and performs radiation contamination measurement, the head radiation detector 11 is lowered by a lifting drive mechanism (not shown) (direction A in FIG. 2). The subject 200 is moved to a position close to the head of the subject 200. In conjunction with the downward movement of the head radiation detector 11, the temporal detector drive motor 14 is connected to the right temporal radiation detector 12 and the left temporal head via the temporal detector coupling shaft 15. The radiation detector 13 is simultaneously moved in the C direction from the initial position and is positioned at the measurement position. Thus, the radiation measurement surfaces of the right temporal radiation detector 12 and the left temporal radiation detector 13 are respectively disposed at positions facing and close to the right temporal head and the left temporal head of the subject 200. Become. Simultaneously with the movement of the right-side and right-side radiation detectors 12 and 13, the neck detector driving motor 18 moves the neck radiation detector 16 from the initial position to the E direction via the fixed frame 17. Move to position at the measurement position. As a result, the radiation measurement surfaces 16a and 16b of the neck radiation detector 16 are arranged at positions facing and close to the neck portion, the throat portion, and the chin portion of the subject 200, respectively.

放射線汚染の測定を終えると、図示しない昇降駆動機構は、頭部用放射線検出器11を上方向(図2のB方向)に移動させる。この頭部用放射線検出器11の上方向への移動と連動して、側頭検出器駆動用電動機14は、側頭検出器連結用シャフト15を介して右側頭用放射線検出器12及び左側頭用放射線検出器13を測定位置からD方向に同時に移動し、初期位置に戻す。また、同時に首用検出器駆動用電動機18は、固定フレーム17を介して首用放射線検出器16を測定位置からF方向に移動させ、初期位置に戻す。   When the measurement of the radiation contamination is finished, the lifting drive mechanism (not shown) moves the head radiation detector 11 upward (direction B in FIG. 2). In conjunction with the upward movement of the head radiation detector 11, the temporal detector drive motor 14 is connected to the right temporal radiation detector 12 and the left temporal head via the temporal detector coupling shaft 15. The radiation detector 13 is simultaneously moved from the measurement position in the D direction and returned to the initial position. At the same time, the neck detector driving motor 18 moves the neck radiation detector 16 from the measurement position in the direction F via the fixed frame 17 to return to the initial position.

このように第1の実施形態によれば、被検者200の首部分、のど部分、顎部分に首用放射線検出器16を接近させて放射線汚染を測定するようにしたので、これらの部分の放射線汚染を確実に測定することができ、より厳密な放射線汚染の検査および出入り管理を行うことが可能となる。   As described above, according to the first embodiment, the neck radiation detector 16 is brought close to the neck portion, the throat portion, and the chin portion of the subject 200 to measure the radiation contamination. Radiation contamination can be reliably measured, and more strict radiation contamination inspection and access control can be performed.

(第2の実施形態)
次に、図5、6を用いて本発明の体表面モニタの第2の実施形態を説明する。第2の実施形態の体表面モニタ100は、図3、4に示される第1の実施形態の首用放射線検出器16に換えて、図5、6に示される右側首用放射線検出器19、左側首用放射線検出器20を備えている。第2の実施形態の体表面モニタ100の駆動機構部26には、この右側首用放射線検出器19、左側首用放射線検出器20と、さらに右側首用放射線検出器駆動用電動機21、左側首用放射線検出器駆動用電動機22、右側首用放射線検出器連結用シャフト23、左側首用放射線検出器連結用シャフト24を設けている。その他の構成は上述した第1の実施形態の体表面モニタ100と同様であり、同一の構成については同一の符号を付している。
(Second Embodiment)
Next, a second embodiment of the body surface monitor of the present invention will be described with reference to FIGS. The body surface monitor 100 according to the second embodiment has a right neck radiation detector 19 shown in FIGS. 5 and 6 instead of the neck radiation detector 16 of the first embodiment shown in FIGS. The left neck radiation detector 20 is provided. The drive mechanism 26 of the body surface monitor 100 of the second embodiment includes the right neck radiation detector 19, the left neck radiation detector 20, the right neck radiation detector driving motor 21, and the left neck. A radiation detector driving motor 22, a right neck radiation detector connecting shaft 23, and a left neck radiation detector connecting shaft 24 are provided. Other configurations are the same as those of the body surface monitor 100 of the first embodiment described above, and the same components are denoted by the same reference numerals.

図5は、被検者200の放射線汚染の測定を行っていないときの駆動機構部26の状態(駆動機構部26の各検出器が初期位置にある状態)を示している。図6は、被検者200の放射線汚染の測定を行っているときの駆動機構部26の状態(駆動機構部26の各検出器が測定位置にある状態)を示している。   FIG. 5 shows a state of the drive mechanism unit 26 (a state where each detector of the drive mechanism unit 26 is in an initial position) when the radiation contamination of the subject 200 is not measured. FIG. 6 shows a state of the drive mechanism unit 26 (a state in which each detector of the drive mechanism unit 26 is in the measurement position) when the radiation contamination of the subject 200 is being measured.

右側首用放射線検出器19は、被検者200の首部分、のど部分、顎部分から放射される放射線のうち被検者200の右方向に放射される放射線を測定する放射性測定面19aを有する。左側首用放射線検出器20は、被検者200の首部分、のど部分、顎部分から放射される放射線のうち被検者200の左方向に放射される放射線を測定する放射性測定面20aを有する。   The right neck radiation detector 19 has a radioactive measurement surface 19a for measuring the radiation radiated in the right direction of the subject 200 out of the radiation radiated from the neck portion, the throat portion, and the chin portion of the subject 200. . The left neck radiation detector 20 has a radioactive measurement surface 20a for measuring the radiation radiated in the left direction of the subject 200 out of the radiation radiated from the neck portion, the throat portion, and the chin portion of the subject 200. .

右側首用放射線検出器駆動用電動機21は右側頭用放射線検出器12に設置されると共に、右側首用放射線検出器連結用シャフト23を介して右側首用放射線検出器19と直結し、この右側首用放射線検出器19を右側頭用放射線検出器12に対して回転可能に保持する。左側首用放射線検出器駆動用電動機22は左側頭用放射線検出器13に設置されると共に、左側首用放射線検出器連結用シャフト24を介して左側首用放射線検出器20と直結し、この左側首用放射線検出器20を左側頭用放射線検出器13に対して回転可能に保持する。   The right neck radiation detector driving motor 21 is installed on the right head radiation detector 12 and is directly connected to the right neck radiation detector 19 via the right neck radiation detector connecting shaft 23. The neck radiation detector 19 is held rotatably with respect to the right temporal radiation detector 12. The left neck radiation detector driving motor 22 is installed on the left head radiation detector 13 and is directly connected to the left neck radiation detector 20 via the left neck radiation detector connecting shaft 24. The neck radiation detector 20 is held rotatably with respect to the left temporal radiation detector 13.

第1の実施形態と同様に、放射線汚染の測定を行う際には、図示しない昇降駆動機構により頭部用放射線検出器11を降下させ、被検者200の頭部の近接位置に移動させる。この頭部用放射線検出器11の下方向への移動と連動して、側頭検出器駆動用電動機14が、側頭検出器連結用シャフト15を介して右側頭用放射線検出器12及び左側頭用放射線検出器13を初期位置からC方向に同時に移動し、測定位置に位置させる。この右側頭用放射線検出器12及び左側頭用放射線検出器13の移動と同時に、右側首用放射線検出器駆動用電動機21及び左側首用放射線検出器駆動用電動機22が回転駆動し、右側首用放射線検出器連結用シャフト23、左側首用放射線検出器連結用24を介して右側首用放射線検出器19及び左側首用放射線検出器20を初期位置からG方向に移動し、測定位置に位置させる。これにより、右側首用放射線検出器19及び左側首用放射線検出器20の放射線測定面19a、20aが、図5に示すように、被検者200の首部分、のど部分、顎部分の左右の側面に対向し且つ近接した位置にそれぞれ配置されることとなる。   As in the first embodiment, when measuring radiation contamination, the head radiation detector 11 is lowered by an elevating drive mechanism (not shown) and moved to a position close to the head of the subject 200. In conjunction with the downward movement of the head radiation detector 11, the temporal detector drive motor 14 is connected to the right temporal radiation detector 12 and the left temporal head via the temporal detector coupling shaft 15. The radiation detector 13 is simultaneously moved in the direction C from the initial position and is positioned at the measurement position. Simultaneously with the movement of the right side radiation detector 12 and the left side radiation detector 13, the right neck radiation detector driving motor 21 and the left neck radiation detector driving motor 22 are rotationally driven to drive the right neck. The right neck radiation detector 19 and the left neck radiation detector 20 are moved in the G direction from the initial position via the radiation detector coupling shaft 23 and the left neck radiation detector coupling 24, and are positioned at the measurement position. . Thereby, as shown in FIG. 5, the radiation measurement surfaces 19a and 20a of the right neck radiation detector 19 and the left neck radiation detector 20 are arranged on the left and right sides of the neck portion, the throat portion, and the chin portion of the subject 200, respectively. It will be arranged at a position facing and close to the side surface.

放射線汚染の測定を終えると、図示しない昇降駆動機構が頭部用放射線検出器11を上方向に移動させる。この頭部用放射線検出器11の上方向への移動と連動して、側頭検出器駆動用電動機14は、側頭検出器連結用シャフト15を介して右側頭用放射線検出器12及び左側頭用放射線検出器13をD方向に移動させ、測定位置から初期位置に戻す。これと同時に右側首用放射線検出器駆動用電動機21及び左側首用放射線検出器駆動用電動機22が回転駆動し、右側首用放射線検出器連結用シャフト23、左側首用放射線検出器連結用シャフト24を介して右側首用放射線検出器19及び左側首用放射線検出器20をH方向に移動させ、測定位置から初期位置に戻す。   When the measurement of the radiation contamination is finished, a lifting drive mechanism (not shown) moves the head radiation detector 11 upward. In conjunction with the upward movement of the head radiation detector 11, the temporal detector drive motor 14 is connected to the right temporal radiation detector 12 and the left temporal head via the temporal detector coupling shaft 15. The radiation detector 13 is moved in the D direction and returned from the measurement position to the initial position. At the same time, the right neck radiation detector driving motor 21 and the left neck radiation detector driving motor 22 are driven to rotate, the right neck radiation detector connecting shaft 23 and the left neck radiation detector connecting shaft 24. Then, the right neck radiation detector 19 and the left neck radiation detector 20 are moved in the H direction to return from the measurement position to the initial position.

このように第2の実施形態によれば、被検者200の首部分、のど部分、顎部分の左右の側面に右側首用放射線検出器19及び左側首用放射線検出器20を接近させて放射線汚染を測定するようにしたので、これらの部分の放射線汚染を確実に測定することができ、より厳密な放射線汚染の検査および出入り管理を行うことが可能となる。   As described above, according to the second embodiment, the right neck radiation detector 19 and the left neck radiation detector 20 are brought close to the left and right side surfaces of the neck portion, the throat portion, and the jaw portion of the subject 200. Since the contamination is measured, it is possible to reliably measure the radiation contamination of these portions, and it is possible to perform a more strict inspection of radiation contamination and access control.

(第3の実施形態)
次に、図7を用いて本発明の体表面モニタの第3の実施形態を説明する。図7は、体表面モニタ100の測定室内から体表面モニタの前面側(前面用放射線検出器2側)を見た斜視図である。
(Third embodiment)
Next, a third embodiment of the body surface monitor of the present invention will be described with reference to FIG. FIG. 7 is a perspective view of the front side (front side radiation detector 2 side) of the body surface monitor viewed from the measurement chamber of the body surface monitor 100.

第3の実施形態の体表面モニタ100は、図3、4に示される第1の実施形態の首用放射線検出器16に換えて、図7に示される首用放射線検出器27を備えている。さらに駆動機構部28、台座29を備える。その他の構成は上述した第1の実施形態の体表面モニタ100と同様であり、同一の構成については同一の符号を付している。   The body surface monitor 100 of the third embodiment includes a neck radiation detector 27 shown in FIG. 7 in place of the neck radiation detector 16 of the first embodiment shown in FIGS. . Furthermore, the drive mechanism part 28 and the base 29 are provided. Other configurations are the same as those of the body surface monitor 100 of the first embodiment described above, and the same components are denoted by the same reference numerals.

首用放射線検出器27は、放射線測定面27a、27bを有している。放射線測定面27aは、被検者200の顎部分を載せることができるようほぼ中央に凹形の顎載せ部27cが設けられている。首用放射線検出器27は、駆動機構部28により上下方向に移動可能に保持されている。首用放射線検出器27は、測定を行っていないときには被検者200の平均的な顎部分の位置として予め定められた初期位置に、駆動機構部28により保持されている。駆動機構部28は、前面フレーム1に固定設置されている。また、前面フレーム1に設置されている前面用放射線検出器2のうち顔面測定用の前面用放射線検出器2aは、首用放射線検出器27の顎載せ部27cに被検者200の顔を置くスペースをとるため、そのスペース分、その他の前面用放射線検出器2b、2cよりも前面フレーム1側に移動させた位置に設置されている。また、被検者200が載る台座29には、右足用放射線検出器7、左足用放射線検出器8が設置されている。   The neck radiation detector 27 has radiation measurement surfaces 27a and 27b. The radiation measurement surface 27a is provided with a concave chin rest portion 27c at substantially the center so that the chin portion of the subject 200 can be placed thereon. The neck radiation detector 27 is held by a drive mechanism 28 so as to be movable in the vertical direction. The neck radiation detector 27 is held by the drive mechanism 28 at an initial position predetermined as an average jaw position of the subject 200 when measurement is not being performed. The drive mechanism 28 is fixedly installed on the front frame 1. Of the front radiation detectors 2 installed on the front frame 1, the front radiation detector 2 a for facial measurement places the face of the subject 200 on the chin rest portion 27 c of the neck radiation detector 27. In order to save space, it is installed at a position that is moved to the front frame 1 side relative to the other front radiation detectors 2b and 2c. Further, a radiation detector 7 for the right foot and a radiation detector 8 for the left foot are installed on the pedestal 29 on which the subject 200 is placed.

なお、台座29を上下方向に昇降移動させる駆動機構部をさらに設けることもできる。また、上述した首用放射線検出器27の駆動機構部28による駆動制御方法、或いは、台座29の図示しない駆動機構部による駆動制御方法として、被検者200の顎位置(或いは頭位置、顔面位置など)を検知するセンサを設け、このセンサにて検知された顎位置(或いは頭位置、顔面位置など)に基づいて首用放射線検出器27、或いは、台座29の移動先の位置を定め、この移動先の位置へ移動させることも可能である。   A drive mechanism unit that moves the base 29 up and down in the vertical direction can be further provided. Further, as a driving control method by the driving mechanism unit 28 of the neck radiation detector 27 described above or a driving control method by a driving mechanism unit (not shown) of the pedestal 29, the jaw position (or head position, face position) of the subject 200 is used. Etc.), and the position of the movement destination of the neck radiation detector 27 or the base 29 is determined based on the jaw position (or head position, face position, etc.) detected by this sensor. It is also possible to move to a destination position.

また、上述した説明では、駆動機構部28は、自動的に首用放射線検出器27を上下方向に昇降移動させるものとして説明したが、被検者200が手動で首用放射線検出器27を上下方向に昇降移動させてその位置を調整できるような構成としても良い。   In the above description, the drive mechanism 28 is described as automatically moving the neck radiation detector 27 up and down in the vertical direction. However, the subject 200 manually moves the neck radiation detector 27 up and down. It is good also as a structure which can be moved up and down to a direction and can adjust the position.

このように第3の実施形態によれば、首用放射線検出器27に被検者200の顎部分を載せて、首部分、のど部分、顎部分を首用放射線検出器27に接近させて放射線汚染を測定できるようにしたので、これらの部分の放射線汚染を確実に測定することができ、より厳密な放射線汚染の検査および出入り管理を行うことが可能となる。   As described above, according to the third embodiment, the chin portion of the subject 200 is placed on the neck radiation detector 27, and the neck portion, the throat portion, and the chin portion are brought close to the neck radiation detector 27 to perform radiation. Since the contamination can be measured, the radiation contamination of these portions can be reliably measured, and it becomes possible to perform a more rigorous inspection of radiation contamination and access control.

また、首用放射線検出器27、或いは、台座29を、上下方向に昇降移動させて被検者200の首部分、のど部分、顎部分に対する相対的な位置を調整できるようにすることで、被検者200が無理な体勢を取らずに測定することが可能になる。   In addition, the neck radiation detector 27 or the pedestal 29 is moved up and down in the vertical direction so that the relative position of the subject 200 with respect to the neck, throat, and chin can be adjusted. The examiner 200 can perform measurement without taking an unreasonable posture.

なお、本発明は、上述した実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより種々の発明を形成できる。例えば、実施形態に示される全構成要素からいくつかの構成要素を削除してもよい。   Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

本発明の体表面モニタを正面から見たときの概観図。The general view when the body surface monitor of this invention is seen from the front. 体表面モニタの測定室の内部の様子を示す図。The figure which shows the mode inside the measurement chamber of a body surface monitor. 第1の実施形態に係る体表面モニタの駆動機構部の各検出器が初期位置にある状態を示した図。The figure which showed the state in which each detector of the drive mechanism part of the body surface monitor which concerns on 1st Embodiment exists in an initial position. 第1の実施形態に係る体表面モニタの駆動機構部の各検出器が測定位置にある状態を示す図。The figure which shows the state in which each detector of the drive mechanism part of the body surface monitor which concerns on 1st Embodiment exists in a measurement position. 第2の実施形態に係る体表面モニタの駆動機構部の各検出器が初期位置にある状態を示す図。The figure which shows the state which each detector of the drive mechanism part of the body surface monitor which concerns on 2nd Embodiment exists in an initial position. 第2の実施形態に係る体表面モニタの駆動機構部の各検出器が測定位置にある状態を示す図。The figure which shows the state in which each detector of the drive mechanism part of the body surface monitor which concerns on 2nd Embodiment exists in a measurement position. 第3の実施形態に係る体表面モニタの測定室の内部から装置前面側を見た斜視図。The perspective view which looked at the device front side from the inside of the measurement room of the body surface monitor concerning a 3rd embodiment.

符号の説明Explanation of symbols

1…前面フレーム、2,2a,2b,2c…前面用放射線検出器、3…右側面用放射線検出器、3a…扉、4…左側面用放射線検出器、4a…扉、5…右手用放射線検出器、6…左手用放射線検出器、7…右足用放射線検出器、8…左足用放射線検出器、9…後面用放射線検出器、10…後面フレーム、11…頭部用放射線検出器、12…右側頭用放射線検出器、13…左側頭用放射線検出器、14…頭部検出器駆動用電動機、15…側頭検出器連結用シャフト、16…首用放射線検出器、16a,16b…放射線測定面、17…固定フレーム、18…首用検出器駆動用電動機、19…右側首用放射線検出器、19a…放射線測定面、20…左側首用放射線検出器、20a…放射線測定面、21…右側首用放射線検出器駆動用電動機、22…左側首用放射線検出器駆動用電動機、23…右側首用放射線検出器連結用シャフト、24…左側首用放射線検出器連結用シャフト、25,26…駆動機構部、27…首用放射線検出器、27a,27b…放射線測定面、27c…顎載せ部、28…駆動機構部、29…台座、100…体表面モニタ、200…被検者。   DESCRIPTION OF SYMBOLS 1 ... Front frame, 2, 2a, 2b, 2c ... Radiation detector for front side, 3 ... Radiation detector for right side, 3a ... Door, 4 ... Radiation detector for left side, 4a ... Door, 5 ... Radiation for right hand Detector: 6 ... Radiation detector for left hand, 7 ... Radiation detector for right foot, 8 ... Radiation detector for left foot, 9 ... Radiation detector for rear surface, 10 ... Rear frame, 11 ... Radiation detector for head region, 12 ... Radiation detector for right temporal region, 13... Radiation detector for left temporal region, 14... Motor for driving head detector, 15... Shaft for connecting temporal detector, 16. Measurement surface, 17 ... fixed frame, 18 ... motor for driving detector for neck, 19 ... radiation detector for right neck, 19a ... radiation measurement surface, 20 ... radiation detector for left neck, 20a ... radiation measurement surface, 21 ... Electric motor for driving radiation detector for right neck, 22 ... Radiation detector driving motor for side neck, 23 ... Shaft for connecting radiation detector for right neck, 24 ... Shaft for connecting radiation detector for left neck, 25, 26 ... Drive mechanism, 27 ... Radiation detector for neck, 27a, 27b ... radiation measurement surface, 27c ... chin rest, 28 ... drive mechanism, 29 ... pedestal, 100 ... body surface monitor, 200 ... subject.

Claims (7)

前面フレームと、前記前面フレームに設置された前面用放射線検出器と、前記前面フレームに開閉可能に設置された扉と、前記扉に設置された側面用放射線検出器と、後面フレームと、前記後面フレームに設置された後面用放射線検出器と、頭部用放射線検出器と、側頭用放射線検出器と、前記頭部用放射線検出器及び前記側頭用放射線検出器を上下方向に昇降可能に前記後面フレームに設置する昇降駆動機構とを備え、被検者の放射線汚染を測定する体表面モニタにおいて、
前記頭部用放射線検出器の前記前面フレームに近い位置に配置され、前記被検者ののど部分、顎部分の少なくとも一箇所に近接した測定位置に移動可能な、前記のど部分、顎部分の少なくとも一箇所の放射線汚染を測定する放射線検出器を更に備えること
を特徴とする体表面モニタ。
A front frame, a front radiation detector installed on the front frame, a door installed on the front frame so as to be openable and closable, a side radiation detector installed on the door, a rear frame, and the rear surface Rear radiation detector installed on the frame, head radiation detector, temporal radiation detector, head radiation detector and temporal radiation detector can be moved up and down A body surface monitor for measuring radiation contamination of a subject, comprising an elevating drive mechanism installed on the rear frame,
Is located closer to the front frame of the head for a radiation detector, throat portion of said subject, which is movable in a measuring position close to at least one portion of the jaw portion, said throat portion, a chin portion A body surface monitor, further comprising a radiation detector for measuring radiation contamination in at least one place.
前記放射線検出器を前記昇降駆動機構による前記頭部用放射線検出器の下方向への移動に連動して初期位置から前記被検者の前記首部分、のど部分、顎部分の少なくとも一箇所に近接する測定位置に移動させる放射線検出器駆動用電動機とを更に備えること
を特徴とする請求項1記載の体表面モニタ。
In conjunction with the downward movement of the head radiation detector by the elevating drive mechanism, the radiation detector is moved from the initial position to at least one of the neck portion, throat portion, and chin portion of the subject. The body surface monitor according to claim 1, further comprising: a radiation detector driving electric motor that is moved to an adjacent measurement position.
前記側頭用放射線検出器は、前記頭部用放射線検出器の前記被検者の側頭に近い位置に移動可能に設置され、
前記放射線検出器は、前記側頭用放射線検出器に移動可能に設置され、
前記側頭用放射線検出器を初期位置から前記被検者の側頭に近接する測定位置に移動させる側頭放射線検出器駆動用電動機と、
前記側頭放射線検出器駆動用電動機の前記側頭用放射線検出器の移動に連動して、前記放射線検出器を初期位置から前記被検者の前記首部分、のど部分、顎部分の少なくとも一箇所に近接する測定位置に移動させる放射線検出器駆動用電動機とを更に備えること
を特徴とする請求項1又は2記載の体表面モニタ。
The temporal radiation detector is movably installed at a position close to the subject's temporal region of the head radiation detector,
The radiation detector is movably installed on the temporal radiation detector,
An electric motor for driving the temporal radiation detector that moves the temporal radiation detector from an initial position to a measurement position close to the temporal region of the subject;
In conjunction with the movement of the temporal radiation detector of the electric motor for driving the temporal radiation detector, the radiation detector is moved from an initial position to at least one of the neck portion, the throat portion, and the jaw portion of the subject. The body surface monitor according to claim 1, further comprising: a radiation detector driving motor that is moved to a measurement position close to the body.
前記放射線検出器は、前記前面フレームの前記被検者の顎に近い位置に配置され、且つ、前記被検者の顎を載せるための顎載せ部を有すること
を特徴とする請求項1記載の体表面モニタ。
The said radiation detector is arrange | positioned in the position close | similar to the said subject's jaw of the said front frame, and has a chin mounting part for mounting the said subject's chin. Body surface monitor.
前記放射線検出器を、前記被検者の顎位置に応じて上下方向に移動する駆動機構部を更に備えること
を特徴とする請求項記載の体表面モニタ。
The body surface monitor according to claim 4 , further comprising a drive mechanism that moves the radiation detector in a vertical direction according to a jaw position of the subject.
前記駆動機構部は、前記放射線検出器の位置を手動にて調整可能とすること
を特徴とする請求項記載の体表面モニタ。
The body surface monitor according to claim 5 , wherein the drive mechanism unit is capable of manually adjusting a position of the radiation detector.
前記被検者の顎位置を検知するセンサをさらに備え、
前記駆動機構部は、前記センサにより検知された前記被検者の顎位置に基づいて前記放射線検出器の位置を調整すること
を特徴とする請求項記載の体表面モニタ。
A sensor for detecting the jaw position of the subject;
The body surface monitor according to claim 5 , wherein the drive mechanism unit adjusts the position of the radiation detector based on a jaw position of the subject detected by the sensor.
JP2007117112A 2007-04-26 2007-04-26 Body surface monitor Expired - Fee Related JP4861240B2 (en)

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