ABSTRACT
Crawford and King 1990). The elimination of the step-andshoot scan mode and the resultant interscan delay marked the entrance of CT technology and application into a new era, resulting in remarkable advantages in the clinic, for example, faster patient throughput, less contrast agent, improvement in patient comfort, and resultant reduction of motion artifact or spatial misregistration. The clinical community acclaimed the overwhelming success of spiral/helical CT, driving all major CT manufacturers to deliver their spiral/helical CT products within a short time in the beginning of the 1990s.
