Kabushiki Kaisha Toshiba

Keisei Shuto

Tsutomu Yamakawa

Takuzou Takayama

A radiation detector includes a plate-like monocrystal for converting a radiation ray radiated from an object to be examined to a visible ray, a glass plate provided on the monocrystal for transmitting the visible ray generated in the monocrystal and a plurality of photomultipliers arranged on the glass plate for converting the visible ray inputted through the glass plate from the monocrystal to an electrical signal.

Radiation detector and its manufacturing method

In a scintillation camera system, a total number of reference light sources such as LEDs is considerably reduced with reference to a total number of photomultiplier tubes, and a defect occurring in either the reference light source, or the photomultiplier tube can be detected. The scintillation camera system includes: a plurality of photomultiplier tubes (4A:4N) for outputting scintillation signals; at least three reference light sources (5A:5B:5C) positioned continuous to the plurality of photomultiplier tubes (4A:4N), one of these plural photomultiplier tubes (4A:4N) being separated from the three reference light sources at an equidistance; a signal processing unit (6) for processing the scintillation signal outputs from the plural photomultiplier tubes (4A:4N) to produce feedback signals; and a controlling unit (7) for controlling radiation from the reference light sources (5A:5B:5C) in response to the feedback signals.

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Ootawara, Japan

Keisei Shuto