Single-slice reconstruction method for helical cone-beam differential phase-contrast CT

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 2nd International Conference on Biomedical Engineering and Biotechnology, 11–13 October 2013, Wuhan, China

Article type: Research Article

Authors: Fu, Jian^; | Chen, Liyuan

Affiliations: Research Center of Digital Radiation Imaging and Biomedical Imaging, Beijing University of Aeronautics and Astronautics, 100191 Beiijng, People's Republic of China. E-mail: [email protected], [email protected]

Note: [] Corresponding author. E-mail: [email protected].

Abstract: X-ray phase-contrast computed tomography (PC-CT) can provide the internal structure information of biomedical specimens with high-quality cross-section images and has become an invaluable analysis tool. Here a simple and fast reconstruction algorithm is reported for helical cone-beam differential PC-CT (DPC-CT), which is called the DPC-CB-SSRB algorithm. It combines the existing CB-SSRB method of helical cone-beam absorption-contrast CT with the differential nature of DPC imaging. The reconstruction can be performed using 2D fan-beam filtered back projection algorithm with the Hilbert imaginary filter. The quality of the results for large helical pitches is surprisingly good. In particular, with this algorithm comparable quality is obtained using helical cone-beam DPC-CT data with a normalized pitch of 10 to that obtained using the traditional inter-row interpolation reconstruction with a normalized pitch of 2. This method will push the future medical helical cone-beam DPC-CT imaging applications.

Keywords: X-ray differential phase-contrast imaging, computed tomography, helical scanning, reconstruction algorithm

DOI: 10.3233/BME-130782

Journal: Bio-Medical Materials and Engineering, vol. 24, no. 1, pp. 45-51, 2014