To improve the counting rate of a two-dimensional radiation image detector.
This two-dimensional image detector uses a scintillator, liquid scintillator, or phosphor as a detection medium, detects fluorescence occurring from these detection media using lateral optical fiber fluxes and longitudinal optical fiber fluxes arranged in an orthogonal lattice shape, and determines an incidence position of the radiation or neutrons. When photons of the fluorescence released from the lateral and longitudinal optical fiber fluxes are detected using a photodetector and a wave height discriminator, and a radiation image is constituted based on the output lateral and longitudinal optical fiber fluxes, based on a timing pulse signal output from the wave height discriminator, a retriggerable pulse signal generator for generating a pulse in a retriggerable state is used, a time width is determined based on Poisson distribution corresponding to the fluorescence lifetime of the detection media, a pulse signal to be generated is generated, and a two-dimensional image of radiation or neutrons is obtaned based on the generated pulse signal.
| JP2000187077A | 2000-07-04 | |||
| JPS5366273A | 1978-06-13 |
| WO2000004403A1 | 2000-01-27 |
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toru Miyamae
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