JPS57194373A - Gamma ray detector for positron ct - Google Patents
Gamma ray detector for positron ctInfo
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
- Nuclear Medicine (AREA)
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.
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)
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)
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 |
-
1981
- 1981-05-26 JP JP7864781A patent/JPS57194373A/en active Granted
Patent Citations (1)
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)
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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