X-ray or gamma ray systems or devices – Electronic circuit – X-ray source power supply
Patent
1982-05-05
1984-02-21
Church, Craig E.
X-ray or gamma ray systems or devices
Electronic circuit
X-ray source power supply
378146, G03B 4116
Patent
active
044334303
ABSTRACT:
In order to prevent the stray radiation produced in a subject from reaching the image recording carrier a slit diaphragm mechanism is already known in which the employed diaphragms are moved during the radiographic recording relatively to the subject and image recording carrier. In order to attain, in addition to the extensive secondary ray blanking-out within a single radiographic recording, an optimum exposure for subject parts of strongly varying density in a simple and reliable fashion, it is proposed in accordance with the disclosure that the diaphragm exhibit an additional aperture, whereby the radiation beam passing through this additional aperture irradiates a subject region to be imaged chronologically later and impinges on a detector, whose signal is supplied to a device for the control of the exposure. Through the device the high voltage of the x-ray source can be particularly advantageously controlled.
REFERENCES:
patent: 4051377 (1977-09-01), Kemner
patent: 4097748 (1978-06-01), Monvoisen
patent: 4333012 (1982-06-01), Furuichi
Erich Krestel, Imaging Systems for Medical Diagnostics, Siemens AG Publishing House, Berlin & Munich, 1980, pp. 190-201.
Church Craig E.
Siemens Aktiengesellschaft
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