Simultaneous correction of limited-angular-range and beam-hardening artifacts in dual-energy CT

Buxin Chen; Zheng Zhang; Dan Xia; Emil Y. Sidky; Xiaochuan Pan

doi:10.1117/12.2611975

4 April 2022 Simultaneous correction of limited-angular-range and beam-hardening artifacts in dual-energy CT

Buxin Chen, Zheng Zhang, Dan Xia, Emil Y. Sidky, Xiaochuan Pan

Proceedings Volume 12031, Medical Imaging 2022: Physics of Medical Imaging; 120313C (2022) https://doi.org/10.1117/12.2611975
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Conference Poster

Abstract

Dual-energy CT (DECT) with limited-angular-range (LAR) data is of interest, as it could potentially reduce radiation dose and scanning time and avoid collision of the moving gantry with the imaged subject. In DECT with LAR data, images suffer from LAR and beam-hardening (BH) artifacts. In this work, we investigate the simultaneous correction of LAR and BH artifacts for DECT with LAR data. Under a scanning configuration with overlapping arcs of low- and high-kVp spectra, data are generated from a digital suitcase phantom. A data-domain decomposition method is used to correct for the BH artifacts first, while basis images are reconstructed from the decomposed basis sinograms of LAR by use of the previously developed directional-total-variation (DTV) algorithm to correct for the LAR artifacts. Visual inspection of the monochromatic images and quantitative analysis of estimated atomic numbers suggest that the simultaneous correction of BH and LAR artifacts in DECT can effectively reduce, and almost eliminate, BH and LAR artifacts in monochromatic images from data of LAR as low as 30◦ , and also yield accurately estimated atomic numbers that are almost numerically identical to the reference values from the full-angular-range data of 360° .

Conference Presentation

Citation Download Citation

Buxin Chen, Zheng Zhang, Dan Xia, Emil Y. Sidky, and Xiaochuan Pan "Simultaneous correction of limited-angular-range and beam-hardening artifacts in dual-energy CT", Proc. SPIE 12031, Medical Imaging 2022: Physics of Medical Imaging, 120313C (4 April 2022); https://doi.org/10.1117/12.2611975

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