Model-based material decomposition with system blur modeling

Wenying Wang; Matthew Tivnan; Grace J. Gang; Yiqun Ma; Qian Cao; Minghui Lu; Josh Star-Lack; Richard E. Colbeth; Wojciech Zbijewski; J. Webster Stayman

doi:10.1117/12.2549549

16 March 2020 Model-based material decomposition with system blur modeling

Wenying Wang, Matthew Tivnan, Grace J. Gang, Yiqun Ma, Qian Cao, Minghui Lu, Josh Star-Lack, Richard E. Colbeth, Wojciech Zbijewski, J. Webster Stayman

Author Affiliations +

Proceedings Volume 11312, Medical Imaging 2020: Physics of Medical Imaging; 113123Q (2020) https://doi.org/10.1117/12.2549549
Event: SPIE Medical Imaging, 2020, Houston, Texas, United States

Abstract

In this work, we present a novel model-based material decomposition (MBMD) approach for x-ray CT that includes system blur in the measurement model. Such processing has the potential to extend spatial resolution in material density estimates - particularly in systems where different spectral channels exhibit different spatial resolutions. We illustrate this new approach for a dual-layer detector x-ray CT and compare MBMD algorithms with and without blur in the reconstruction forward model. Both qualitative and quantitative comparisons of performance with and without blur modeling are reported. We find that blur modeling yields images with better recovery of high-resolution structures in an investigation of reconstructed line pairs as well as lower cross-talk bias between material bases that is ordinarily found due to mismatches in spatial resolution between spectral channels. The extended spatial resolution of the material decompositions has potential application in a range of high-resolution clinical tasks and spectral CT systems where spectral channels exhibit different spatial resolutions.

Citation Download Citation

Wenying Wang, Matthew Tivnan, Grace J. Gang, Yiqun Ma, Qian Cao, Minghui Lu, Josh Star-Lack, Richard E. Colbeth, Wojciech Zbijewski, and J. Webster Stayman "Model-based material decomposition with system blur modeling", Proc. SPIE 11312, Medical Imaging 2020: Physics of Medical Imaging, 113123Q (16 March 2020); https://doi.org/10.1117/12.2549549

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available