X-ray diagnostic apparatus

Details X-ray diagnostic apparatus X-ray diagnostic apparatus

1985-04-05

1987-04-14

Church, Craig E.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

378100, 358111, 364414, H05G 160

Patent

active

046584129

ABSTRACT:
X-ray diagnostic apparatus is disclosed having a video camera, at least one image memory, a differential stage to produce substraction images by forming the difference between a stored video signal and a video signal chronologically following the former signal, an evaluation circuit for the time evaluation of changes in the subtraction images, and a video monitor. The evaluation circuit includes a time memory for storing information about the chronological flow of the radiographic contrast medium. The evaluation circuit also includes an additional circuit that repeatedly scans the information stored in the time memory and reproduces only those of the image points on the monitor whose information meet a specified criterion. The value of this criterion is increased step-by-step.

REFERENCES:
patent: 4398213 (1983-08-01), Haendle
patent: 4436095 (1984-03-01), Kruger
patent: 4536790 (1985-08-01), Kruger et al.

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