X-ray detector having function of compensating for sensitivity o

Details X-ray detector having function of compensating for sensitivity o X-ray detector having function of compensating for sensitivity o

1990-06-19

1991-06-18

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

250361R, G01N 2300

Patent

active

050254626

ABSTRACT:
A multi-channel type solid-state X-ray detector includes a base plate, multi-channel photodiodes arranged on the upper surface of the base plate and having one ends connected as output terminals to electrically conductive lines on the base plate, and a number of scintillators disposed on the photodiodes of respective channels, for generating scintillation light corresponding to incident X-rays when the X-rays are irradiated. Those end portions of the scintillators which lie on the other ends of the photodiodes are extended and a light emitting diode arranged in a flat plate configuration is disposed in contact with the underside of the extended portions on the upper surface of the base plate. The scintillators are shielded with respect to light on portions other than the underside which is in contact with the light emitting diode and photodiodes by reflective coating material or the like, and light from the light emitting diode is permitting to be projected into the entire portion of the scintillators. The light projection compensates for radiation damage of the scintillators and prevents the detection sensitivity of the scintillators from being lowered.

REFERENCES:
patent: 4543490 (1985-09-01), Gupta

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