X-ray diagnostics installation for subtraction angiography

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

1995-03-17

1997-05-20

Lateef, Marvin M.

Surgery

Truss

Pad

378 62, 378 63, 378 985, A61B 505

Patent

active

056304145

ABSTRACT:
An X-ray diagnostics installation has an X-ray source and an X-ray image intensifier video chain, including an X-ray image intensifier, a video camera, a control circuit that derives control pulses for producing images of a subject from data supplied thereto identifying exposure conditions, and a subtraction circuit for forming the difference between stored video signals and continuing, current video signals given the same exposure conditions. The X-ray source is cyclically moved during the production of a number of successive images, with the control circuit deriving the control pulses for the production of images from apparatus positions and, possibly, from the ECG of the subject. The subtraction circuit forms the difference between predetermined video signals stored for different apparatus positions and heart phases of a heart cycle and continuing, current video signals obtained at the same apparatus positions and at the same heart phase.

REFERENCES:
patent: 4433428 (1984-02-01), Haendle et al.
patent: 4709385 (1987-11-01), Pfeiler et al.

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