倒置式扇形束CT的算法研究

Study on the Algorithm of the Reverse Geometry Based on Fan Beam CT

与传统的X线透射成像相比,倒置式X线透射成像结构有着投影数据信噪比高的优点,因而可以提高透射图像的密度分辨率,本文提出了倒置式二维CT的概念,并给出了倒置式扇形束CT的完全重建条件及重建算法。

Compared with the conventional configuration of X-radiography system, Reverse Geometry X-radiography imaging may obtain X-ray projections with high SNR, contrast and sensitivity due to minimal scatter detection. In this paper, we borrow the concept of Reverse Geometry and extend it to 2D CT. Then we derive the fully reconstruction condition and the relevant reconstruction algorithm in view of fan beam projection.