JPS57194373A - Gamma ray detector for positron ct - Google Patents

Gamma ray detector for positron ct

Info

Publication number
JPS57194373A
JPS57194373A JP7864781A JP7864781A JPS57194373A JP S57194373 A JPS57194373 A JP S57194373A JP 7864781 A JP7864781 A JP 7864781A JP 7864781 A JP7864781 A JP 7864781A JP S57194373 A JPS57194373 A JP S57194373A
Authority
JP
Japan
Prior art keywords
crystals
outside wall
light
film
crystal
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
JP7864781A
Other languages
Japanese (ja)
Other versions
JPS6135518B2 (en
Inventor
Katsumi Takami
Tatsuro Hayashi
Takeshi Ueda
Kenichi Okajima
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 JP7864781A priority Critical patent/JPS57194373A/en
Publication of JPS57194373A publication Critical patent/JPS57194373A/en
Publication of JPS6135518B2 publication Critical patent/JPS6135518B2/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 obtain a gamma ray detector that suits to a positron CT of high resolving power and high S/N by so constituting the same that the outside shape of a crystal group and the shape of a photodetecting surface assume a square shape and coincide exactly and that the fluorescence from the crystals is transmitted efficiently to a PMT side. CONSTITUTION:A reflection film 3 is so constituted as to cover not only the crystal surfaces but also the PMT side surfaces downward sufficiently from the position level of a photoelectric surface. The light propagating in the outside wall direction at this time is perfectly scatttered and reflected by the BaSO4 coated on the outside wall and propagates again to the photoelectric surface side. If necessary, the reflection film on the outside wall is also formed between 1' and 1'' by a scepter such as lead tungstate so that the fluorescences of the crystals 1' and 1'' arrive effectively at the PMT side. It is also possible to form a refelection film like a wedge in the lower part of the crystal connecting surface by increasing the thickness of an optical coupling film 4 and to reflect the light in a diagonal direction in order to reduce the crosstalk of the light from both crystals.
JP7864781A 1981-05-26 1981-05-26 Gamma ray detector for positron ct Granted JPS57194373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7864781A JPS57194373A (en) 1981-05-26 1981-05-26 Gamma ray detector for positron ct

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7864781A JPS57194373A (en) 1981-05-26 1981-05-26 Gamma ray detector for positron ct

Publications (2)

Publication Number Publication Date
JPS57194373A true JPS57194373A (en) 1982-11-29
JPS6135518B2 JPS6135518B2 (en) 1986-08-13

Family

ID=13667649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7864781A Granted JPS57194373A (en) 1981-05-26 1981-05-26 Gamma ray detector for positron ct

Country Status (1)

Country Link
JP (1) JPS57194373A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823016A (en) * 1986-09-18 1989-04-18 Hamamatsu Photonics Kabushiki Kaisha Scintillation detector for three-dimensionally measuring the gamma-ray absorption position and a positron CT apparatus utilizing the scintillation detector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648560A (en) * 1979-09-29 1981-05-01 Kagaku Gijutsucho Hoshasen Igaku Sogo Kenkyusho Position detector for radiant ray

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648560A (en) * 1979-09-29 1981-05-01 Kagaku Gijutsucho Hoshasen Igaku Sogo Kenkyusho Position detector for radiant ray

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823016A (en) * 1986-09-18 1989-04-18 Hamamatsu Photonics Kabushiki Kaisha Scintillation detector for three-dimensionally measuring the gamma-ray absorption position and a positron CT apparatus utilizing the scintillation detector

Also Published As

Publication number Publication date
JPS6135518B2 (en) 1986-08-13

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