Attenuation correction for x-ray fluorescence computed tomography (XFCT) utilizing transmission CT image

Siyuan Zhang; Liang Li; Zhiqiang Chen

doi:10.1117/12.2534823

28 May 2019 Attenuation correction for x-ray fluorescence computed tomography (XFCT) utilizing transmission CT image

Siyuan Zhang, Liang Li, Zhiqiang Chen

Proceedings Volume 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine; 110722N (2019) https://doi.org/10.1117/12.2534823
Event: Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 2019, Philadelphia, United States

Abstract

This work proposes an attenuation correction method for x-ray fluorescence computed tomography (XFCT). The phantom is irradiated by a polychromatic cone-beam source produced by a conventional x-ray tube. X-ray fluorescence (XRF) photons are stimulated by the incident beam and are then collected by a photon counting detector placed on one side of the beamline. A flat-panel detector is placed along the beamline for detection of attenuation information. For quantitative reconstruction of XFCT images, the attenuation of incident photons as well as XRF photons in the phantom are estimated utilizing the transmission CT images. Simulation results show that the attenuation correction method proposed in this work significantly improves the accuracy of image reconstruction for XFCT, which enables quantitative identification of fluorescence materials in the objects.

Citation Download Citation

Siyuan Zhang, Liang Li, and Zhiqiang Chen "Attenuation correction for x-ray fluorescence computed tomography (XFCT) utilizing transmission CT image", Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110722N (28 May 2019); https://doi.org/10.1117/12.2534823

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