A robust general phase retrieval method for medical applications

作者：Yan A; Wu X^*; Liu H

来源：Journal of Instrumentation, 2013, 8(05): C05007.

DOI：10.1088/1748-0221/8/05/C05007

• Medical-image reconstruction methods and algorithms computer-aided so
• X-ray radiography and digital radiography (DR)

From medical imaging perspective the robustness of a phase retrieval method is of critical importance. In this presentation we compare the robustness of two general phase retrieval methods, namely the transport of intensity equation inversion (TIE-inversion) method and the attenuation partition based (AP-based) method. We showed that the TIE-inversion method, regardless if being assisted with the Tikhonov regularization, failed to retrieve the phase maps in two experimental studies. The failure exposes this method%26apos;s weakness as being unstable against the noise. In contrast, the sample phase maps are retrieved successfully by using the AP-based method. The stark performance differences of the two methods are rooted in their different techniques dealing with the singularity problem. This comparison shows that the robust AP-based phase retrieval method will be superior to the TIE-inversion method for medical imaging applications where radiation doses are stringently limited.

• 出版日期2013-5