ESTRO 2025 - Abstract Book

S2983

Physics - Image acquisition and processing

ESTRO 2025

Conclusion: The contrast and spatial resolution were improved using a linac-mounted PCD, however addressing the temporal dependence of the PCD response is critical for enhancing energy weighted contrast. A CBCT spectral reconstruction workflow has also been developed to assess the 3D spectral image quality of the proposed prototype. Further improvements will involve utilising the energy information to improve scatter rejection techniques and enhance soft-tissue contrast.

Keywords: Spectral Imaging, Cone Beam CT

References: 1. R. Ballabriga, J. Alozy, G. Blaj, M. Campbell, M. Fiederle, E. Frojdh, E. H. Heijne, X. Llopart, M. Pichotka, Procz, L. Tlustos, and W. Wong, The medipix3RX: A high resolution, zero dead-time pixel detector readout chip allowing spectroscopic imaging, Journal of Instrumentation 8 (2013) 2. IEC, IEC 62220-1-1:2015 -Medical Electrical Equipment -Characteristics of Digital X Ray Imaging Devices - Part 1-1: Determination of the Detective Quantum Efficiency - Detectors used in radiographic imaging, Technical report, IEC, 2015