三源螺旋CT精确重建算法在动态重建中的应用

Application of Exact Reconstruction Algorithm of Triple-source Helical CT in Dynamic Reconstruction

目的将三源CT精确重建算法应用到动态重建的场合,用于抑制心脏或呼吸运动在CT成像中产生的伪迹。方法采用单源与三源CT精确重建算法对两种动态数字模型进行仿真重建。通过比较三源CT与单源CT的重建结果,评价三源精确重建算法在动态重建方面的性能。结果三源CT的扫描方式能够有效抑制动态重建中的伪迹,改善重建质量。结论本文的结果证实了多源CT精确重建算法在动态重建中的有效性,对于进一步改善心脏成像及小动物成像质量具有积极的实际意义。

Objective To reduce the artifacts produced by cardiac or respiratory motion, through the application of exact reconstruction algorithm with triple-source CT in dynamic reconstruction. Methods Simulation studies on two dynamic phantoms were performed with exact reconstruction algorithms of both single-source and triplesource spiral CT. The performance of triple-source spiral CT in dynamic reconstruction was evaluated with comparing the reconstruction results from triple-source and single-source configurations. Results The triplesource configuration could effectively reduce the artifact in dynamic reconstruction. Conclusion The results of this paper confirm the validity of the exact reconstruction algorithm of multi-source CT, which has the potential to improve the image quality in cardiac imaging and small animal imaging.