Importance

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Abstract

It is desirable in a digital subtraction angiography to realize the stereoscopic X-ray image visualization of a blood vessel by means of an X-ray diagnostic apparatus. In accordance with the invention, the object such as blood vessels is projected by X-rays before and after injection of the X-ray contrast medium at two different projection angles with respect to the object, i.e., right view and left view. So right-viewed X-ray 'mask images'' and 'subtraction images'' video signals and left-viewed X-ray 'mask images'' and 'subtraction images'' video signals are separatedly obtained. Then the right-viewed mask image's video signal is combined with the left-viewed one, resulting in one stereoscopic visual TV picture consisting of the desired portions of both the right-viewed image and the left-viewed image on the TV monitor simultaneously. Similar combination processing is carried out in the subtraction images' video signals, so that one can observe stereoscopically the combined subtraction images of the blood vessels on the TV monitor.

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First Claim