基于新型重建算法的低剂量CT成像技术

Low-dose CT imaging techniques based on new reconstruction algorithms

近年来,低剂量CT已成为研究热点。本文针对螺旋CT和平板CT成像模式介绍目前低剂量CT图像重建领域的一些主要的技术路线和方法,重点对目前流行的几种低剂量CT重建方法进行分析和概括,包括基于PI线重建和内重建的局部成像方法、基于压缩感知理论的稀疏采样成像方法和基于新型统计迭代的低剂量成像方法;并对低电流CT扫描及基于噪声模型的统计迭代技术以及低剂量CT的临床应用现状进行回顾与展望。

Nowadays, low-dose CT has become a hot topic in research. The progresses of some representative low-dose CT techniques and image processing methods for helical CT and cone-beam CT were reviewed, mainly expounded some new developments on this area, including ROI imaging methods based on PI-line and interior reconstruction, sparse sampling imaging based on compressed sensing and low-mAs scanning based on novel statistic iterative methods, etc., and the clinical applications and future perspectives of low-dose imaging were introduced in this article.