JP2018087818A - 安定化光出力を有する画像化応用のための放射線検出器 - Google Patents
安定化光出力を有する画像化応用のための放射線検出器 Download PDFInfo
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- ORCSMBGZHYTXOV-UHFFFAOYSA-N bismuth;germanium;dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Ge].[Ge].[Ge].[Bi].[Bi].[Bi].[Bi] ORCSMBGZHYTXOV-UHFFFAOYSA-N 0.000 description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 3
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- 239000002019 doping agent Substances 0.000 description 3
- ZPDRQAVGXHVGTB-UHFFFAOYSA-N gallium;gadolinium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Gd+3] ZPDRQAVGXHVGTB-UHFFFAOYSA-N 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
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- 239000002131 composite material Substances 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
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- 230000002441 reversible effect Effects 0.000 description 2
- 239000013076 target substance Substances 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
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- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
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- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/2002—Optical details, e.g. reflecting or diffusing layers
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- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
- G01T1/2023—Selection of materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
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Abstract
【解決手段】放射線検出器は、シンチレータ、光源、及びセンサを備えうる。該シンチレータは、不可視放射線(入射放射線)を可視光に変換する能力を有するシンチレーション物質を含みうる。該センサは、何らかの変換された可視光を該センサにより検出又は測定するために、該シンチレータに隣接して又は近傍に置かれうる。該光源は、該シンチレータを光に曝すために、該シンチレータに隣接して又は近傍に置かれ、該光源からの該光が、該シンチレータ内の欠陥と相互作用し、該欠陥によりもたらされた該シンチレータ内のシンチレーションの干渉を最小にする。
【選択図】図1
Description
本出願は、参照によりその開示の全ての内容が本明細書に組み入れられるところの、2013年6月14日に出願された「RADIATION DETECTOR FOR IMAGING APPLICATIONS WITH STABILIZED LIGHT OUTPUT」と題する米国仮特許出願第61/835,072号の利益を主張する。
本発明は、高エネルギー画像化システムおよび高エネルギー光子検出器に関する。
シンチレーション物質は、医療画像化、地質学的調査、国土安全保障を含む様々な応用並びに高エネルギー物理学における、高エネルギー光子、電子、及び他の粒子を検出するための光検出器と関連して科学的にも経済的にも重要である。放射線検出/画像化装置において、シンチレーション物質(例えば、セリウム添加シンチレータ)が用いられる。これらシンチレータ(放射線検出媒体)において、これらの応用においてそれらの価値を最大にするために、或る特性が望まれる。一般に、高シンチレーション光収量(light yield:光子収率ともいう)、高速シンチレーション運動学(減衰時間と立ち上がり時間の両方)、良好なエネルギー分解能、高精度の比例性、及び環境光被曝に対する相対的不感応性が望まれている。
図1は、本発明の一実施態様の放射線検出器(100)を示す。
Claims (13)
- 放射線検出器であって、
シンチレータ、
光源、及び
センサ
を備え、
該シンチレータは、不可視放射線を可視光に変換する能力を有し、
該センサは、該シンチレータからの変換された可視光を検出するために、該シンチレータの近傍に置かれ、かつ
該光源は、該シンチレータを光に曝すために、該シンチレータの近傍に置かれ、該光源からの該光が、該シンチレータ内の欠陥と相互作用し、該欠陥によりもたらされた該シンチレータ内のシンチレーションの干渉を最小にする、
上記放射線検出器。 - さらに、該シンチレータと該センサの間にフィルタを備えている、請求項1に記載の放射線検出器。
- 該フィルタは、該光源から該光が該センサに到達するのを実質的に防止する、請求項2に記載の放射線検出器。
- 該シンチレータは、GAGG又はGGAG物質を含んでいる、請求項1に記載の放射線検出器。
- 該光源は、該シンチレータを可視光、赤外線、紫外線、X線、又はイオン化放射線に曝す、請求項1に記載の放射線検出器。
- 該光源は、該欠陥を飽和させるために、特定の波長の該光を放出するように調整されている、請求項1に記載の放射線検出器。
- 該光源は、該シンチレータを該光に連続的に曝す、請求項1に記載の放射線検出器。
- 該光源は、シンチレーション検出の間、該シンチレータを該光に連続的に曝す、請求項1に記載の放射線検出器。
- 該光源は、該シンチレータを該光に間欠的又は周期的に曝す、請求項1に記載の放射線検出器。
- 該光源は、該シンチレータを該光のパルスに曝す、請求項1に記載の放射線検出器。
- 該光源は、シンチレーション検出の動作以前の較正フェーズの間の所定の期間、該シンチレータを該光に曝す、請求項1に記載の放射線検出器。
- さらに、該シンチレータを第2の光に曝すために該シンチレータの近傍に置かれた第2光源を備え、該第2光源からの該第2の光が、該シンチレータ内の残光欠陥と相互作用して該欠陥による残光を減らす、請求項1に記載の放射線検出器。
- 該第2光源は、残光欠陥を解放するために特定の波長の該第2の光を発光するように調整される、請求項11に記載の放射線検出器。
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DE112014002831T5 (de) * | 2013-06-14 | 2016-03-10 | Siemens Medical Solutions U.S.A., Inc. | Strahlungsdetektor für Bildgebungsanwendungen mit stabilisierter Lichtausgabe |
US10221355B2 (en) | 2013-07-19 | 2019-03-05 | University Of Tennessee Research Foundation | Ternary metal halide scintillators |
US9624429B2 (en) | 2013-07-19 | 2017-04-18 | University Of Tennessee Research Foundation | Ternary metal halide scintillators |
DE102015212881A1 (de) | 2015-07-09 | 2017-01-12 | Siemens Healthcare Gmbh | Reduktion von Drifteffekten von Szintillatordetektoren durch Lichtbestrahlung |
RU2643219C1 (ru) * | 2017-04-13 | 2018-01-31 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Сцинтилляционный детектор для регистрации импульсного мягкого рентгеновского излучения |
US10591617B2 (en) | 2017-05-03 | 2020-03-17 | University Of Tennessee Research Foundation | Perovskite-type halides and methods thereof |
EP3592825B1 (en) | 2018-02-07 | 2023-04-05 | University of Tennessee Research Foundation | Garnet scintillator co-doped with monovalent ion |
US10838083B2 (en) | 2018-02-14 | 2020-11-17 | University Of Tennessee Research Foundation | Alkali and alkaline earth halides and methods thereof |
US11027152B1 (en) * | 2018-08-06 | 2021-06-08 | Integrated Sensors, Llc | Ionizing-radiation beam monitoring system |
US11560515B2 (en) | 2019-04-05 | 2023-01-24 | University Of Tennessee Research Foundation | Lutetium based oxyorthosilicate scintillators codoped with transition metals |
JP7301607B2 (ja) * | 2019-06-03 | 2023-07-03 | キヤノンメディカルシステムズ株式会社 | 放射線診断装置 |
US11339326B2 (en) | 2020-01-24 | 2022-05-24 | University Of Tennessee Research Foundation | Tl+-based and mixed halide A3B2X9-type scintillators |
CN112034505A (zh) * | 2020-08-31 | 2020-12-04 | 中国科学院西安光学精密机械研究所 | 一种闪烁体余辉精确测量装置及方法 |
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JP6697490B2 (ja) | 2020-05-20 |
US20170219719A1 (en) | 2017-08-03 |
CN105723246A (zh) | 2016-06-29 |
JP2016528484A (ja) | 2016-09-15 |
CN105723246B (zh) | 2019-01-01 |
US10996347B2 (en) | 2021-05-04 |
US9664799B2 (en) | 2017-05-30 |
JP6282729B2 (ja) | 2018-02-21 |
DE112014002831T5 (de) | 2016-03-10 |
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