Phase retrieval for hard X-ray computed tomography of samples with hybrid compositions  

作　　者：刘慧强 任玉琦 郭瀚 薛艳玲 谢红兰 肖体乔 吴希增 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences [2]Department of Radiology,University of Alabama at Birmingham

出　　处：《Chinese Optics Letters》2012年第12期26-29,共4页中国光学快报（英文版）

基　　金：supported by the National Basic Research Program of China (No. 2010CB834301);the External Cooperation Program of Chinese Academy of Science (No. GJHZ09058);the National Natural Science Foundation of China (No. 11105213);XW was supported in part by the U.S. NIH grant R01CA142587;the DoD Breast Cancer Research Program award W81XWH-08-1-0613

摘　　要：X-ray tomography of samples containing both weakly and strongly absorbing materials are necessary in material and biomedical imaging. Extending the validity of the phase-attenuation duality （PAD） method, the propagation-based phase-contrast computed tomography （PPCT） of a sample with hybrid composi- tions of both the light and dense components with 60 keV of synchrotron radiation is investigated. The experimental results show that the PAD-based PPCT is effective in imaging both the weakly and strongly absorbing components simultaneously. Compared with the direct PPCT technique, the PAD-based PPCT technique demonstrates its excellent capability in material discrimination and characterization. In addi- tion, the PAD-based PPCT exhibits a striking performance on the image contrast enhancement and noise suppression. Therefore, this technique is useful for material and biomedical imaging applications, espe- cially when the radiation dose involved imposes a serious constraint.X-ray tomography of samples containing both weakly and strongly absorbing materials are necessary in material and biomedical imaging. Extending the validity of the phase-attenuation duality （PAD） method, the propagation-based phase-contrast computed tomography （PPCT） of a sample with hybrid composi- tions of both the light and dense components with 60 keV of synchrotron radiation is investigated. The experimental results show that the PAD-based PPCT is effective in imaging both the weakly and strongly absorbing components simultaneously. Compared with the direct PPCT technique, the PAD-based PPCT technique demonstrates its excellent capability in material discrimination and characterization. In addi- tion, the PAD-based PPCT exhibits a striking performance on the image contrast enhancement and noise suppression. Therefore, this technique is useful for material and biomedical imaging applications, espe- cially when the radiation dose involved imposes a serious constraint.

关 键 词：Computerized tomography Image segmentation 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TH74[自动化与计算机技术—计算机科学与技术]