Scatter-to-primary ratio in photon counting CT

Ran Zhang; Ke Li; Guang-Hong Chen

doi:10.1117/12.2654253

7 April 2023 Scatter-to-primary ratio in photon counting CT

Ran Zhang, Ke Li, Guang-Hong Chen

Author Affiliations +

Proceedings Volume 12463, Medical Imaging 2023: Physics of Medical Imaging; 1246306 (2023) https://doi.org/10.1117/12.2654253
Event: SPIE Medical Imaging, 2023, San Diego, California, United States

Abstract

In this work, we studied how the scatter-to-primary ratio changes with the energy threshold in photon counting CT. Both Monte Carlo simulations and experimental measurements demonstrated a significantly reduced SPR in the high-energy bin projection data and reduced scatter artifacts in the reconstructed CT images. A new data acquisition scheme named Mohi-Polo was proposed by pushing the high energy threshold towards maximum keV, which generates a quasi-Monochromatic high energy bin and a Polychromatic low energy bin. Utilizing the nearly scatter-free high-energy bin data, we developed an innovative solution to correct the scatter artifacts in the low-energy bin.

Conference Presentation

Citation Download Citation

Ran Zhang, Ke Li, and Guang-Hong Chen "Scatter-to-primary ratio in photon counting CT", Proc. SPIE 12463, Medical Imaging 2023: Physics of Medical Imaging, 1246306 (7 April 2023); https://doi.org/10.1117/12.2654253

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