Radiant energy – With charged particle beam deflection or focussing – With target means
Patent
1979-11-14
1982-01-05
Anderson, Bruce C.
Radiant energy
With charged particle beam deflection or focussing
With target means
250402, H05G 130
Patent
active
043096131
ABSTRACT:
An exemplary embodiment comprises an image intensifier television chain, a device for dose output regulation during fluoroscopy, a function generator for determining the exposure voltage from the fluoroscopic voltage, and an automatic exposure control which keeps the integral of the light output from image intensifier per exposure constant. A manual selector is present by which the exposure voltage can be set, e.g. at any whole number value between 50 kV and 125 kV independently of the automatic circuit for setting this voltage. The automatic exposure control is designed in such manner that, given the manual setting of the exposure voltage, the function generator changes the x-ray tube current given constant exposure time for patient thicknesses that lie below a lower value and, for patient thicknesses above this lower value, changes the exposure time given constant x-ray tube current.
REFERENCES:
patent: 3902069 (1975-08-01), Skarke et al.
patent: 3991314 (1976-11-01), Schmitmann et al.
patent: 4080536 (1978-03-01), Brehm et al.
patent: 4117335 (1978-09-01), Franke
patent: 4160906 (1979-07-01), Daniels et al.
Brunn Klaus
Matura Eike
Polster Walter
Schmitmann Herbert
Anderson Bruce C.
Siemens Aktiengesellschaft
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