螺旋CT指X线源旋转与病人平移在数据采集过程中同步完成,数据采集为容积式,它标志着CT成象技术的又一次飞跃。螺旋CT自1989年应用于临床以来,克服了常规CT的一些不足,已广泛应用于全身各个各位的检查。1 原理与技术 常规CT扫描是在病人屏气过程中获理一系列单独的扫描层面,在扫描间隔床移到下一次扫描位置时允 Spiral CT refers to the rotation of the X-ray source and the translation of the patient during the data acquisition process is completed simultaneously. The data acquisition is volumetric, which marks another leap in CT imaging technology. Spiral CT has been used in clinical since 1989, to overcome some of the shortcomings of conventional CT, has been widely used in all body parts of the examination. 1 Principles and Techniques Conventional CT scan is in the process of patient breath received a series of separate scanning level, the scanning interval bed to move to the next scan position allow