X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1993-06-21
1994-09-13
Porta, David P.
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 9811, H05G 164
Patent
active
053475704
ABSTRACT:
The invention relates to a method for peripheral angiography in which the examination zone and an X-ray imaging system are displaced relative to one another and X-ray images of neighbouring parts of the examination zone are formed in different positions, a contrast image and a mask image being acquired from the X-ray images, and the contrast image and the mask image being subtracted from one another; the invention also relates to an arrangement for carrying out the method. Improved geometrical correspondence between the contrast image and the mask image is achieved in accordance with the invention in that, after contrast medium injection, the displacement is controlled so that the contrast medium bolus is always reproduced in the X-ray images and that the contrast image is acquired from the X-ray image lines which already reproduce the contrast medium whereas the mask image is acquired from the parts of the X-ray images which do not yet reproduce the contrast medium.
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Porta David P.
Slobod Jack D.
U.S. Philips Corporation
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