X-ray or gamma ray systems or devices – Electronic circuit – Exposure timer
Patent
1991-06-28
1992-06-23
Church, Craig E.
X-ray or gamma ray systems or devices
Electronic circuit
Exposure timer
378108, H05G 164
Patent
active
051250187
ABSTRACT:
An X-ray diagnostic apparatus including an imaging system in which X-rays are applied to a subject and a picture image in response to an X-ray does transmitted through the subject is displayed comprises an X-ray generator for generating an X-ray a detecting unit for detecting the X-ray generated from the X-ray generator and passing through the subject disposed between the X-ray generator and the detecting unit and for generating a signal in response to the detected X-ray, a deciding unit operatively connected to the detecting unit for deciding an optimum imaging condition for a portion of the subject to be imaged before a start of an imaging process, a unit for detecting whether the imaging system or the subject is being moved or not, and a controlling unit for controlling the imaging condition within a predetermined interval of time during or after the movement of the imaging system or the subject. The detecting unit for the movement of the imaging system or the subject includes a first recording memory for recording the digital signal just before injecting a contrast medium successively as a mask image, a second recording memory for recording the digital signal after injecting the contrast medium successively as a transmitted image.
REFERENCES:
patent: 4477923 (1984-10-01), Baumann et al.
patent: 4626908 (1986-12-01), Tani
patent: 4703496 (1987-10-01), Meccariello
Church Craig E.
Kabushiki Kaisha Toshiba
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