Tokyo Shibaura Denki Kabushiki Kaisha

Tsutomu Yamakawa

Mineki Nishikawa

Tomohiko Kihara

Hirokatsu Yoshizawa

Multi-imaging apparatus for displaying isotope radiation distribution images derived from scintillation cameras, including a single processor including circuitry which enables a plurality of separate images taken respectively by scintillation cameras to be displayed or exposed on photographic film, and a display system including a cathode ray tube display device in combination with a photographic camera unit. Plural sets of X and Y-coordinate signals along with unblanking signals supplied from a plurality of the scintillation cameras are processed and the different images of the radioisotope distribution taken respectively by the different scintillation cameras are exposed on a single frame of an X-ray film.

Multi-imaging apparatus for the scintillation camera

A method for controlling a scintillation camera has a step of, under the control of a CPU, displacing a radiation source displacing device to which is fixed a radiation source and obtaining a center of sensitivity of a photomultiplier tube to be measured. After the center of sensitivity including the effects of the waveform shaping circuit is obtained, the radiation source is displaced in a plurality of directions relative to the center of sensitivity under the control of the CPU, so as to obtain an average photomultiplier tube response (PMT response) as a function of distance from the center of sensitivity of the photomultiplier tube. The CPU compares the obtained average PMT response with a reference PMT response which provides an image of optimal uniformity to obtain data by which the average PMT response approaches the reference PMT response. Based on this data, the CPU obtains parameters of the waveform shaping circuit to provide a response close to the reference PMT response.

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Ootawara, Japan

Tsutomu Yamakawa