Hybrid subtraction for improved arteriography.
Hybrid subtraction for improved arteriography.
复制标题
混合减法以改善动脉造影。
作者：
W. Brody
本文提出了一种混合减影方法来降低静脉动脉造影时间减影的运动敏感性。混合减影使用双能量扫描投影放射摄影提供减影软组织的造影前和造影后图像。然后减去这些造影前和造影后的软组织消除图像。由于不自主运动（如吞咽或肠蠕动）通常主要影响软组织，因此这种混合技术比单纯的颞叶或双能量减影更能显示颈动脉和腹部动脉。
A hybrid subtraction method to reduce the motion sensitivity of temporal subtraction for intravenous arteriography is described. Hybrid subtraction uses dual-energy scanned projection radiography to provide pre- and post-contrast images with the soft tissues subtracted. These pre- and post-contrast soft-tissue-cancelled images are then subtracted. Because involuntary motion (such as swallowing or bowel peristalsis) often affects soft tissues primarily, this hybrid technique provides better visualization of carotid and abdominal arteries than temporal or dual-energy subtraction alone.