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1. JP2012058154 - RADIOGRAPHIC IMAGE DETECTOR

Office
Japan
Application Number 2010203515
Application Date 10.09.2010
Publication Number 2012058154
Publication Date 22.03.2012
Publication Kind A
IPC
G01T 1/20
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
20with scintillation detectors
A61B 6/00
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
C09K 11/00
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
11Luminescent, e.g. electroluminescent, chemiluminescent, materials
C09K 11/85
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
11Luminescent, e.g. electroluminescent, chemiluminescent, materials
08containing inorganic luminescent materials
77containing rare earth metals
85containing halogen
G01N 23/04
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/-G01N17/178
02by transmitting the radiation through the material
04and forming images of the material
G01T 1/18
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
18with counting-tube arrangements, e.g. with Geiger counters
CPC
G01T 1/205
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
20with scintillation detectors
205the detector being a gas
C09K 11/7773
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
11Luminescent, e.g. electroluminescent, chemiluminescent materials
08containing inorganic luminescent materials
77containing rare earth metals
7766containing two or more rare earth metals
7772Halogenides
7773with alkali or alkaline earth metal
Applicants TOKUYAMA CORP
株式会社トクヤマ
TOHOKU UNIV
国立大学法人東北大学
KYOTO UNIV
国立大学法人京都大学
UNIV OF TOKYO
国立大学法人 東京大学
Inventors FUKUDA KENTARO
福田 健太郎
ISHIZU SUMUTO
石津 澄人
KAWAGUCHI NORIAKI
河口 範明
SUYAMA TOSHIHISA
須山 敏尚
YOSHIKAWA AKIRA
吉川 彰
YANAGIDA TAKEYUKI
柳田 健之
YOKOTA YUI
横田 有為
KUBO HIDETOSHI
窪 秀利
KUROSAWA SHUNSUKE
黒澤 俊介
TANIGAMI KOJIRO
谷上 幸次郎
TANIMORI TORU
谷森 達
SEKIYA HIROYUKI
関谷 洋之
Agents 小野 尚純
奥貫 佐知子
Title
(EN) RADIOGRAPHIC IMAGE DETECTOR
(JA) 放射線画像検出器
Abstract
(EN)

PROBLEM TO BE SOLVED: To provide a novel radiographic image detector which is capable of detecting radial rays such as hard X-rays or γ-rays with high sensitivity and improves positional resolution and a count rate property.

SOLUTION: The present invention relates to a radiographic image detector obtained by combining a scintillator for converting an incident radial ray into an ultraviolet ray and a gas amplification type ultraviolet image detector for converting the ultraviolet ray into an electron and amplifying and detecting such an electron by utilizing a gas electron avalanche phenomenon. The scintillator is a LiLuF4 crystal containing at least one kind of elements selected from among Nd, Er and Tm and the gas amplification type ultraviolet image detector is comprised of a photoelectric transducer material such as cesium iodide or cesium telluride for converting the ultraviolet ray into the electron, a gas electron amplifier for amplifying the electron by utilizing the gas electron avalanche phenomenon, and a pixel type electrode having an amplification function and a detection function.

COPYRIGHT: (C)2012,JPO&INPIT

(JA)

【課題】 硬X線やγ線等の放射線を高感度で検出することができ、位置分解能及び計数率特性に優れた、新規な放射線画像検出器を提供することを目的とする。
【解決手段】 入射した放射線を紫外線に変換するシンチレーターと、紫外線を電子に変換し、かかる電子をガス電子雪崩現象を利用して増幅し、検出するガス増幅型紫外線画像検出器とを組み合わせた放射線画像検出器であって、シンチレーターがNd、Er及びTmから選ばれる少なくとも1種の元素を含有するLiLuF結晶であり、ガス増幅型紫外線画像検出器が、ヨウ化セシウムやテルル化セシウムなどの紫外線を電子に変換する光電変換物質、電子をガス電子雪崩現象を利用して増幅するガス電子増幅器、及び増幅機能と検出機能を有するピクセル型電極より構成されることを特徴とする放射線画像検出器である。
【選択図】 図1

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