CT低剂量技术新进展

Latest development of low-dose CT technique

目的:探讨目前CT低剂量技术的最新进展。方法:从宽探测器的应用、探测器材质的更新换代、大pitch加快扫描速度及迭代重建算法的演变4个角度,阐述低剂量技术的原理、优缺点和发展趋势。结果:CT低剂量技术的应用,可以在保证诊断有效信息的前提下,降低患者辐射剂量最多可达86%。结论:尽管存在一些限制,先进的CT低剂量技术可以大大降低患者辐射剂量,并为更深广的诊断需求提供了可能。

Objective： To decrease the radiation for computed tomography examination and to improve the safety of patients is an important direction of the development of CT technique. Methods： We demonstrated the principles, merits and drawback and their potentialities of each kind of new low-dose CT technique. Results： With the new developed low-dose CT technique, patients＇ dose could be reduced by 86% without losing clinical information. Conclusion： Despite of some limitation, new developed low-dose CT techniques can decrease patients＇ dose dramatically and make more widely and deeply clinical needs possible.