X-ray or gamma ray systems or devices – Electronic circuit – Exposure timer
Patent
1982-03-31
1983-08-23
Smith, Alfred E.
X-ray or gamma ray systems or devices
Electronic circuit
Exposure timer
378 98, H05G 0126, H05G 0128
Patent
active
044008210
ABSTRACT:
In an exemplary embodiment, two radiation detectors are present which are covered on their inlet sides for the radiation by two x-ray filters of different absorption. A divider divides the two output signals of the radiation detectors so that its output signal is a measure of the time variation of x-ray tube voltage during an exposure. The output signal of the divider is supplied to a time measurement circuit which provides a measure of the exposure time during which the x-ray tube voltage is greater than or equal to a predetermined value.
REFERENCES:
patent: 3515873 (1970-06-01), Higgins et al.
patent: 4361900 (1982-11-01), Siedband
Aichinger Horst
Kranberg Heinz E.
Grigsby T. N.
Siemens Aktiengesellschaft
Smith Alfred E.
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