JPS57194374A - Gamma ray detector for positron ct - Google Patents

Gamma ray detector for positron ct

Info

Publication number
JPS57194374A
JPS57194374A JP7864881A JP7864881A JPS57194374A JP S57194374 A JPS57194374 A JP S57194374A JP 7864881 A JP7864881 A JP 7864881A JP 7864881 A JP7864881 A JP 7864881A JP S57194374 A JPS57194374 A JP S57194374A
Authority
JP
Japan
Prior art keywords
layer
soln
binder
crystal
positron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7864881A
Other languages
Japanese (ja)
Other versions
JPS6114474B2 (en
Inventor
Katsumi Takami
Kenichi Okajima
Takeshi Ueda
Fumio Kawaguchi
Kenji Ishimatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP7864881A priority Critical patent/JPS57194374A/en
Publication of JPS57194374A publication Critical patent/JPS57194374A/en
Publication of JPS6114474B2 publication Critical patent/JPS6114474B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G01T1/2002—Optical details, e.g. reflecting or diffusing layers

Abstract

PURPOSE:To detect annihilating gamma rays effectively and to improve the sensitivity of a positron CT by using multilayered reflection films for the rectangular parallelopiped Bi4Ge3O12 scintillator crystal of which only the surface facing a photoelectric multiplier is roughly polished. CONSTITUTION:Only the side of a rectangular parallelopiped crystal 1' of Bi4 Ge3O12 opposit from a photoelectric multiplier 6 side is roughly polished (about #400-#100 roughness in JIS), and all the other surfaces are made specular. In the case of spraying a reflecting agent 3' to the crystal surface first, only the pure BaSO4 is dissolved in an aq. soln. and the soln. is coated thinly by compressed air. A slight binder (for example, polyvinyl alcohol) is included in the 2nd layer to be spray-coated after the moisture of the pure BaSO4 layer of the 1st layer has throughly evaporated. After the evaporation of the moisture of the 2nd layer, a slightly larger amt. of the binder is included in the 3rd layer and the soln. is sprayed. Thereafter, the binder is increased successively and about 7-12 layers of reflection films are formed.
JP7864881A 1981-05-26 1981-05-26 Gamma ray detector for positron ct Granted JPS57194374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7864881A JPS57194374A (en) 1981-05-26 1981-05-26 Gamma ray detector for positron ct

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7864881A JPS57194374A (en) 1981-05-26 1981-05-26 Gamma ray detector for positron ct

Publications (2)

Publication Number Publication Date
JPS57194374A true JPS57194374A (en) 1982-11-29
JPS6114474B2 JPS6114474B2 (en) 1986-04-18

Family

ID=13667677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7864881A Granted JPS57194374A (en) 1981-05-26 1981-05-26 Gamma ray detector for positron ct

Country Status (1)

Country Link
JP (1) JPS57194374A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141087A (en) * 1982-12-29 1984-08-13 ゼネラル・エレクトリック・カンパニイ Solid detector module
US4658141A (en) * 1984-04-03 1987-04-14 Harshaw/Filtrol Partnership Inorganic scintillator crystal having a highly reflective surface
WO2003029841A1 (en) * 2001-09-27 2003-04-10 Nihon Medi-Physics Co., Ltd. Radiation detector
WO2012153223A1 (en) * 2011-05-12 2012-11-15 Koninklijke Philips Electronics N.V. Optimized scintilator crystals for pet
WO2016167334A1 (en) * 2015-04-16 2016-10-20 三菱化学株式会社 Radiological image conversion screen, flat-panel detector, radiation detection device, and scintillator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141087A (en) * 1982-12-29 1984-08-13 ゼネラル・エレクトリック・カンパニイ Solid detector module
US4658141A (en) * 1984-04-03 1987-04-14 Harshaw/Filtrol Partnership Inorganic scintillator crystal having a highly reflective surface
WO2003029841A1 (en) * 2001-09-27 2003-04-10 Nihon Medi-Physics Co., Ltd. Radiation detector
US7180069B2 (en) 2001-09-27 2007-02-20 Nihon Medi-Physics Co., Ltd. Radiation detector
AU2002332330B2 (en) * 2001-09-27 2007-04-26 Nihon Medi-Physics Co., Ltd. Radiation detector
WO2012153223A1 (en) * 2011-05-12 2012-11-15 Koninklijke Philips Electronics N.V. Optimized scintilator crystals for pet
CN103518145A (en) * 2011-05-12 2014-01-15 皇家飞利浦有限公司 Optimized scintilator crystals for pet
US9012854B2 (en) 2011-05-12 2015-04-21 Koninklijke Philips N.V. Optimized scintilator crystals for PET
WO2016167334A1 (en) * 2015-04-16 2016-10-20 三菱化学株式会社 Radiological image conversion screen, flat-panel detector, radiation detection device, and scintillator

Also Published As

Publication number Publication date
JPS6114474B2 (en) 1986-04-18

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