Advanced material separation technique based on dual energy CT scanning

Alexander A. Zamyatin; Anusha Natarajan; Yu Zou

doi:10.1117/12.811703

13 March 2009 Advanced material separation technique based on dual energy CT scanning

Alexander A. Zamyatin, Anusha Natarajan, Yu Zou

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 725844 (2009) https://doi.org/10.1117/12.811703
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

We propose a method for material separation using dual energy data. Our method is suitable to separation of three or more materials. In this work we describe our method and show results of numerical simulation and with real dual-energy data of a head phantom. The proposed method of constructing the material separation map consists of the following steps: Data-domain dual energy decomposition - Vector plot - Density plot - Clustering - Color assignment. Density plots are introduced to allow automatic cluster separation. We use special image processing methods, including Gaussian decomposition, to improve the accuracy of material separation. We also propose using the HSL color model for better visualization and to bring a new dimension in material separation display. We study applications of bone removal and virtual contrast removal. Evaluation shows improved accuracy compared to standard methods.

Citation Download Citation

Alexander A. Zamyatin, Anusha Natarajan, and Yu Zou "Advanced material separation technique based on dual energy CT scanning", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725844 (13 March 2009); https://doi.org/10.1117/12.811703

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