光学相干层析的三维血管成像方法及其算法

Methods and Algorithms of OCTA

光学相干层析血管造影(OCTA)以光学相干层析(OCT)为基础,是一种新型、无损、快速、安全的三维血管成像技术。OCTA成像的方法有多种,根据其算法使用的OCT信号信息可将其分为基于相位、振幅和复合信号3种类型。本文在描述各类型的成像原理、算法及其优缺点后,对3种类型的OCTA方法进行了比较,其中使用复合信号的类型成像质量最好。同时,结合OCTA的研究进展对其未来的发展进行了展望。

Based on OCT,OCTA is a newly invented,non-invasive,fast and safe technology of volumetric imaging about blood flow.According to the OCT signal information they use,methods of OCTA can be divided into three categories:phase based algorithms,amplitude based algorithms and complex algorithms.After depicting the imaging principle,specific algorithm and advantages/disadvantages,methods of these three categories are compared in which complex category achieve best performance on imaging.Research progress is combined to discuss the prospect of OCTA.