低剂量CT成像的研究现状与展望

Research Status and Prospect for Low-Dose CT Imaging

低剂量CT扫描能够有效减少患者接受的辐射剂量,但同时会导致成像质量的下降。在降低剂量的同时,获得可用于临床诊断的高质量图像已经成为近年来CT领域研究的重点方向。本文从低剂量CT的成像方式和图像质量改善等方面介绍了国内外低剂量CT技术的发展与应用,包括低剂量CT扫描的实施方式,低剂量CT扫描的数据模型,相关重建算法与图像后处理策略。本文对近年来国内外研究团队在低剂量CT技术的研究上进行了概括,最后对目前该领域的研究工作进行了总结和分析。

The low-dose CT scans can effectively reduce the dose exposure of patients.However,the imaging quality will be lowered in the meantime.The way of maintaining high quality image that available for clinical diagnosis has become the main research direction in the field of CT technology.This paper summarizes the development and implementation of low-dose CT scans from the following aspects：low-dose scan implementation;statistical model of measurements;reconstruction methods and image processing methods.The research status of low-dose CT technology is also summarized.Finally,both the current research focus and the future research prospect are discussed and analyzed.