Chord-based image reconstruction from clinical projection data

Martin King; Dan Xia; Xiaochuan Pan; Michael Vannier; Thomas Köhler; Patrick La Riviére; Emil Sidky; Maryellen Giger

doi:10.1117/12.772884

18 March 2008 Chord-based image reconstruction from clinical projection data

Martin King, Dan Xia, Xiaochuan Pan, Michael Vannier, Thomas Köhler, Patrick La Riviére, Emil Sidky, Maryellen Giger

Proceedings Volume 6913, Medical Imaging 2008: Physics of Medical Imaging; 69132G (2008) https://doi.org/10.1117/12.772884
Event: Medical Imaging, 2008, San Diego, California, United States

Abstract

Chord-based algorithms can eliminate cone-beam artifacts in images reconstructed from a clinical computed tomography (CT) scanner. The feasibility of using chord-based reconstruction algorithms was evaluated with three clinical CT projection data sets. The first projection data set was acquired using a clinical 64-channel CT scanner (Philips Brilliance 64) that consisted of an axial scan from a quality assurance phantom. Images were reconstructed using (1) a full-scan FDK algorithm, (2) a short-scan FDK algorithm, and (3) the chord-based backprojection filtration algorithm (BPF) using full-scan data. The BPF algorithm was capable of reproducing the morphology of the phantom quite well, but exhibited significantly less noise than the two FDK reconstructions as well as the reconstruction obtained from the clinical scanner. The second and third data sets were obtained from scans of a head phantom and a patient's thorax. For both of these data sets, the BPF reconstructions were comparable to the short-scan FDK reconstructions in terms of image quality, although sharper features were indistinct in the BPF reconstructions. This research demonstrates the feasibility of chord-based algorithms for reconstructing images from clinical CT projection data sets and provides a framework for implementing and testing algorithmic innovations.

Citation Download Citation

Martin King, Dan Xia, Xiaochuan Pan, Michael Vannier, Thomas Köhler, Patrick La Riviére, Emil Sidky, and Maryellen Giger "Chord-based image reconstruction from clinical projection data", Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69132G (18 March 2008); https://doi.org/10.1117/12.772884

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