X-ray diagnostics installation for substraction angiography

Details X-ray diagnostics installation for substraction angiography X-ray diagnostics installation for substraction angiography

1986-01-30

1987-11-24

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

378 95, 358111, H05G 164, H04N 532

Patent

active

047093854

ABSTRACT:
An x-ray diagnostics installation for subtraction angiography has an image memory connected to an output of an x-ray image intensifier video chain which has a number of addresses for storing individual x-ray video signals obtained during a dynamic body cycle of a patient under observation. A differencing unit receives stored signals from the image memory as well as current video signals and substracts those signals to form a superimposed image. Entry and readout of signals to and from the image memory is under the command of a control unit which is connected to the patient through, for example, an EKG circuit for identifying selected occurrences in the body cycle under observation. Entry and readout of data from the image memory is thereby controlled in synchronization with the selected occurrences in the cycle.

REFERENCES:
patent: 4204225 (1980-05-01), Mistretta
patent: 4430749 (1984-02-01), Schardt
patent: 4433428 (1984-02-01), Haendle et al.

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