Automatic x-ray exposure unit

Details Automatic x-ray exposure unit Automatic x-ray exposure unit

1991-07-23

1992-09-15

Porta, David P.

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378 37, 378 95, H05G 144

Patent

active

051484609

ABSTRACT:
An automatic x-ray exposure unit has first and second radiation detectors disposed sequentially and in registry in the direction of radiation propagation following the examination space. Each radiation detector is formed by a matrix of detector elements, also in registry. The detector elements are connected to a computer which calculates the quotient of the signals of each pair of detector elements in the first and second radiation detectors which are in registry. Those pairs of detector elements having a signal quotient which is above a predetermined threshold are automatically taken into consideration for selecting the measuring field for an x-ray exposure.

REFERENCES:
patent: 2983819 (1961-05-01), Bigelow et al.
patent: 4034222 (1977-07-01), Azam et al.
patent: 4097741 (1978-06-01), Pfeiler et al.
patent: 4189645 (1980-02-01), Chaney et al.
patent: 4260894 (1981-04-01), Neumann
patent: 4455669 (1984-06-01), Aichinger et al.
patent: 4744099 (1988-05-01), Hoettenrauch et al.
patent: 4763343 (1988-08-01), Yanaki

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