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US08077952B2 Precomputed automatic pixel shift for review of digital subtracted angiography 有权
预先计算的自动像素位移用于数字减影血管造影检查

Precomputed automatic pixel shift for review of digital subtracted angiography
Abstract:
Disclosed are method and apparatus for motion correction of Digital Subtracted Angiography (DSA) images. Prior to display of DSA image frames, a pixel shift vector is calculated for each fill frame. For a fill frame in which a pixel shift vector cannot be directly calculated, an approximate pixel shift vector is interpolated between, or extrapolated from, other pixel shift vectors. A mask frame is shifted by a pixel shift vector. The resulting shifted mask frame is subtracted from the corresponding fill frame to generate a motion-corrected subtracted frame, which is then displayed on a video display. Motion correction is performed prior to diagnostic review.
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