JP2018091704A - 放射線検出装置 - Google Patents
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Abstract
【解決手段】この放射線検出装置100は、所定のエネルギー量を有する放射線の受光に基づいて複数のシンチレーション光を放出する複数のシンチレータ10を含むシンチレータ群1と、シンチレーション光の入射に基づいて検出信号を出力する複数の光電変換素子21を含む複数の光検出部2と、光検出部により出力された検出信号を取得する制御部3とを備え、光検出部2は、1つのシンチレータ10から生じたシンチレーション光を検出するようにシンチレータ10ごとに設けられ、制御部3は、放射線の有するエネルギーの値と取得した検出信号に基づくヒストグラムに含まれる複数の特徴部分とに基づいて、検出信号を補正する。
【選択図】図1
Description
まず、図1を参照して、本実施形態による放射線検出装置100の全体構成について説明する。本実施形態では、放射線検出装置100をTOF陽電子放射断層撮影装置(以下、TOF−PET装置)101に用いる例について説明する。なお、TOF陽電子放射断層撮影装置は、特許請求の範囲の「陽電子放射断層撮影装置」の一例である。
次に、図3〜図9に基づいて、放射線検出装置の検出信号に対する補正処理について説明する。
本実施形態では、以下のような効果を得ることができる。
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更(変形例)が含まれる。
2 光検出部
3 制御部
10 シンチレータ
21 光電変換素子
100 放射線検出装置
101 TOF−PET装置(TOF陽電子放射断層撮影装置)
Claims (5)
- 所定のエネルギー量を有する放射線の受光に基づいて複数のシンチレーション光を放出する複数のシンチレータを含むシンチレータ群と、
前記シンチレーション光の入射に基づいて検出信号を出力する複数の光電変換素子を含む複数の光検出部と、
前記光検出部により出力された前記検出信号を取得する制御部とを備え、
前記光検出部は、1つの前記シンチレータから生じた前記シンチレーション光を検出するように前記シンチレータごとに設けられ、
前記制御部は、前記放射線の有するエネルギーの値と取得した前記検出信号に基づくヒストグラムに含まれる複数の特徴部分とに基づいて、前記検出信号を補正するように構成されている、放射線検出装置。 - 前記制御部は、前記ヒストグラムに含まれる前記特徴部分である光電吸収ピークの読み取り値およびコンプトンエッジの読み取り値に基づいて、前記検出信号を補正するための前記光検出部の検出値と検出値の補正値との対応関係を取得するように構成されている、請求項1に記載の放射線検出装置。
- 前記制御部は、前記対応関係を、前記ヒストグラムに含まれる光電吸収ピークおよびコンプトンエッジの各々の読み取り値と前記補正値に対応する理論値とを対応させる二次関数に基づいて取得する、請求項2に記載の放射線検出装置。
- 前記制御部は、取得した前記検出信号に基づいた前記シンチレーション光の前記ヒストグラムに含まれる前記光電吸収ピークの近傍を補正するように構成されている、請求項2または3に記載の放射線検出装置。
- 陽電子放射断層撮影装置に用いられる、請求項1〜4のいずれか1項に記載の放射線検出装置。
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JP2016234825A JP6737154B2 (ja) | 2016-12-02 | 2016-12-02 | 放射線検出装置 |
US15/703,287 US10545249B2 (en) | 2016-12-02 | 2017-09-13 | Radiation detection device |
CN201710840571.XA CN108152849B (zh) | 2016-12-02 | 2017-09-15 | 放射线检测装置 |
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CN108968999B (zh) * | 2018-08-10 | 2023-03-21 | 上海联影医疗科技股份有限公司 | 探测器时间甄别方法、探测器和医学成像设备 |
JP2022540010A (ja) * | 2019-07-11 | 2022-09-14 | 定垣企業有限公司 | 放射線ビーム検出装置 |
KR20220046933A (ko) * | 2020-10-08 | 2022-04-15 | 강원대학교산학협력단 | 컴프턴 효과를 활용한 방사선 민감도 증진 방법 및 방사선 민감도 증진 시스템 |
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US6448560B1 (en) * | 1996-02-02 | 2002-09-10 | Tumay O. Tumer | Method and apparatus for gamma ray detection |
US5677536A (en) * | 1996-06-19 | 1997-10-14 | Smv America | Gamma camera with on the fly calibration for PMT drift |
US5793045A (en) * | 1997-02-21 | 1998-08-11 | Picker International, Inc. | Nuclear imaging using variable weighting |
JP4659962B2 (ja) * | 2000-10-04 | 2011-03-30 | 株式会社東芝 | 核医学診断装置 |
US7135688B2 (en) * | 2003-06-02 | 2006-11-14 | Mirmar Sensor, L.L.C. | Apparatus and method for the detection of the energy of ionizing electro-magnetic radiation |
EP1624411A3 (en) * | 2004-08-06 | 2006-08-09 | Gendex Corporation | Soft tissue filtering in medical images |
WO2010067220A2 (en) * | 2008-12-10 | 2010-06-17 | Koninklijke Philips Electronics N.V. | Autonomous detector module as a building block for scalable pet and spect systems |
US8378310B2 (en) * | 2009-02-11 | 2013-02-19 | Prismatic Sensors Ab | Image quality in photon counting-mode detector systems |
JP5467839B2 (ja) * | 2009-10-13 | 2014-04-09 | 日立アロカメディカル株式会社 | 放射線測定装置 |
CN102933983B (zh) * | 2010-06-10 | 2015-05-27 | 株式会社岛津制作所 | 二维位置图校正方法 |
CN103492907A (zh) * | 2011-03-03 | 2014-01-01 | 圣戈本陶瓷及塑料股份有限公司 | 利用非均匀隔片的成像阵列的系统、方法和装置 |
US8294110B2 (en) | 2011-03-11 | 2012-10-23 | Kabushiki Kaisha Toshiba | Method for improved correction of SiPM non-linearity in multiplexed radiation detectors |
US9063237B2 (en) * | 2012-05-08 | 2015-06-23 | Koninklijke Philips N.V. | SPECT/PET imaging system |
RU2665330C2 (ru) * | 2013-11-08 | 2018-08-29 | Шлюмбергер Текнолоджи Б.В. | Спектральный анализ с использованием спектральной деконволюции |
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US10545249B2 (en) | 2020-01-28 |
CN108152849B (zh) | 2021-03-12 |
US20180156928A1 (en) | 2018-06-07 |
CN108152849A (zh) | 2018-06-12 |
JP6737154B2 (ja) | 2020-08-05 |
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