Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1984-05-16
1988-12-27
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
G01T 124
Patent
active
047942576
ABSTRACT:
A radiation quantum-counting method and apparatus for producing high resolution radiographic images capable of discriminating soft tissue cancer having a lcm size. The high resolution image is generated by a plurality of radiation sensitive elements, each element including a semiconductor material having a pair of electrodes mounted on opposite faces thereof. Each element is highly sensitive and produces a rapid pulse count since the thickness of the semiconductor material is substantially 0.1-0.5 mm, and the semiconductor material has an effective atomic number greater than 30 and an energy band gap greater than 1.3 eV. As a plurality of radiation quanta emanate from the radiation source, they are received by the plurality of radiation sensitive elements which detect individual radiation quantum and produce a pulse signal for each detected quantum. Coupled to each radiation sensitive element is a pulse amplifier for amplifying the pulse signals. The amplified pulse signals are counted and used to produce radiographic image signals containing details of image gradation. The pulse count may also be stored in a memory and used to provide two-dimensional information when combined with other pulse count data derived when the spatial orientation between the objective body and the radiation source is changed.
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Baba Sueki
Tsutsui Hiroshi
Yamamoto Osamu
Yamashita Tadaoki
Fields Carolyn E.
Matsushita Electric - Industrial Co., Ltd.
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