Simulation of polychromatic x-ray attenuation to validate and improve two-dimensional beam-hardening correction

Graham Davis

doi:10.1117/12.2596237

9 September 2021 Simulation of polychromatic x-ray attenuation to validate and improve two-dimensional beam-hardening correction

Graham Davis

Author Affiliations +

Proceedings Volume 11840, Developments in X-Ray Tomography XIII; 118401A (2021) https://doi.org/10.1117/12.2596237
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

It is well known that beam-hardening gives rise to errors in the reconstructed linear attenuation coefficient that vary with position, thus invalidating post-reconstruction calibration methods. Prior to reconstruction, projections can be linearized, but this works only for samples composed of a single phase. Two-dimensional beam-hardening correction has been proposed for the two-phase case. A method for forward projection from polyhedral phantoms has also been proposed in the past. Here, this method has been extended to simulate polychromatic radiation and a hierarchical representation of phantom materials is proposed. This is used to create a liquid-immersed tooth phantom. The phantom projection data was then used to validate and improve the two-dimensional beam-hardening correction algorithm.

Conference Presentation

Citation Download Citation

Graham Davis "Simulation of polychromatic x-ray attenuation to validate and improve two-dimensional beam-hardening correction", Proc. SPIE 11840, Developments in X-Ray Tomography XIII, 118401A (9 September 2021); https://doi.org/10.1117/12.2596237

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