Projection-domain material decomposition for PCD CT with pixel-to-pixel variations

Le résumé fourni par la source

We present a material decomposition framework for photon-counting CT that accounts for pixel-to-pixel variation correction. In our previous study,1 we proposed a calibration-based approach to correct for pixel-to-pixel variation. Building on this work, we extend the framework to perform material decomposition. Water–bone basis maps are estimated using a polynomial-based method calibrated on the corrected detector response. To address bowtie-induced spatially varying spectra, the method performs block-wise calibration across the detector and interpolates the resulting polynomial coefficients to each pixel. Simulation results demonstrate that the proposed framework provides reliable and quantitatively consistent results supporting its applicability to practical photon-counting CT systems.

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