Projection-domain iteration to estimate unreliable measurements.

Visual Computing for Industry, Biomedicine and Art
Gengsheng L Zeng

Abstract

Due to the beam-hardening effect of the broad energy spectrum of the X-ray source in computed tomography, the reconstructed images usually suffer from severe artifacts when metallic objects are being imaged. Metal artifact correction methods are usually sophisticated and not practical, especially in some non-medical applications, in which the linear attenuation coefficients are unknown. This paper suggests a simple and effective algorithm to estimate the unreliable measurements. The proposed algorithm is an iterative algorithm, in which the iteration is performed in the projection domain, while the objective function is set up in the image domain. The final image is reconstructed with the conventional filtered backprojection algorithm. The feasibility of the proposed method is verified with airport bags that contain some unknown metals.

References

Sep 1, 1976·Physics in Medicine and Biology·R E Alvarez, A Macovski
Sep 1, 1981·Medical Physics·L A LehmannA L Hall
Nov 1, 2001·IEEE Transactions on Medical Imaging·B De ManP Suetens
Apr 4, 2002·IEEE Transactions on Medical Imaging·Idris A Elbakri, Jeffrey A Fessler
Jul 28, 2007·Medical Physics·Magdalena BazalovaFrank Verhaegena
Apr 10, 2012·Medical Physics·Esther MeyerMarc Kachelrieß
Oct 9, 2012·Medical Physics·Seemeen KarimiHarry Martz
Nov 1, 2012·AJR. American Journal of Roentgenology·Lifeng YuCynthia H McCollough
Nov 7, 2012·Medical Physics·Barbel KratzThorsten M Buzug
Dec 25, 2013·Proceedings of the National Academy of Sciences of the United States of America·Mohammadreza NasiriavanakiLihong V Wang
Feb 6, 2015·Medical Physics·Sören SchüllerMarc Kachelrieß
Sep 22, 2015·IEEE Transactions on Medical Imaging·Hyoung ParkJin Seo
Mar 13, 2018·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Masaki KatsuraOsamu Abe
Jun 6, 2018·IEEE Transactions on Medical Imaging·Yanbo Zhang, Hengyong Yu
Oct 8, 2018·European Journal of Radiology·R H H WellenbergG J Streekstra
Dec 21, 2018·IEEE Transactions on Medical Imaging·Zhiqian ChangCharles Bouman
Aug 10, 2019·IEEE Transactions on Medical Imaging·Haofu LiaoJiebo Luo

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Citations

Jun 2, 2021·Visual Computing for Industry, Biomedicine and Art·Gengsheng L Zeng, Megan Zeng

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Methods Mentioned

BETA
X-ray

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