Radiant energy – Automatic/serial detection of similar sources
Patent
1988-03-18
1989-03-28
Howell, Janice A.
Radiant energy
Automatic/serial detection of similar sources
2504841, G05B 102
Patent
active
048166782
ABSTRACT:
A method of detecting stored radiation energy level on a stimulable phosphor sheet comprises the steps of storing a predetermined level of radiation energy on a stimulable phosphor sheet for test before image read-out is carried out by scanning a stimulable phosphor sheet carrying a radiation image stored thereon with stimulating rays which cause the stimulable phosphor sheet to emit light and detecting the emitted light by a photomultiplier, carrying out the scanning and light detection for the stimulable phosphor sheet for test, and detecting a voltage Vo generated at a bleeder resistor of the photomultiplier at each scanning position. In the course of carrying out image read-out from the stimulable phosphor sheet carrying the radiation image stored thereon, a voltage V generated at the bleeder resistor is detected at each scanning position, and the voltage V is compared with the voltage Vo. Based on the value V-Vo, a radiation energy level exceeding the predetermined level is detected.
REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4400619 (1983-08-01), Kotera et al.
patent: 4590369 (1986-05-01), Horikawa
patent: 4687937 (1987-08-01), Aagano et al.
Fuji Photo Film Co. , Ltd.
Hannaher Constantine
Howell Janice A.
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