Abstract: In this paper we introduced some of the technique advancements of GE Light Speed VCT in hardware, software and reconstruction algorithm areas,and how these advancements improved image quality and brought many advanced clinical applications into reality including 5-beat cardiac,emergency chest pain Triple Rule Out<sup<TM</sup< and total stroke work-up.We also discussed the need to balance image quality and X ray dose and what GE was doing to achieve the goal of getting diagnostic CT images at the lowest possible dose.