The dependence of image quality on the number of high and low kVp projections in dual energy CT using the prior image constrained compressed sensing (PICCS) algorithm

Timothy P. Szczykutowicz; Jiang Hsieh; Guang-Hong Chen

doi:10.1117/12.844471

22 March 2010 The dependence of image quality on the number of high and low kVp projections in dual energy CT using the prior image constrained compressed sensing (PICCS) algorithm

Timothy P. Szczykutowicz, Jiang Hsieh, Guang-Hong Chen

Author Affiliations +

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 762221 (2010) https://doi.org/10.1117/12.844471
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

Dual energy CT using a fast kVp switching technique and the standard filtered back projection (FBP) image reconstruction method has recently been studied. With conventional FBP methods, high slew rates are required for acceptable image reconstruction with high image quality. However, high slew rates also require hardware changes to enable data acquisition. In this work, we aim at studying the necessary slew rate for dual energy CT imaging provided that the PICCS algorithm is used for image reconstruction. The results demonstrate that a slew rate of 7.5 kV / view (assuming 2,000 views were collected over 360^o with a 60 kVp energy separation) was sufficient for dual energy imaging using PICCS.

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Timothy P. Szczykutowicz, Jiang Hsieh, and Guang-Hong Chen "The dependence of image quality on the number of high and low kVp projections in dual energy CT using the prior image constrained compressed sensing (PICCS) algorithm", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 762221 (22 March 2010); https://doi.org/10.1117/12.844471

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