Investigation on substantial asymmetry of HU value in dental cone-beam CT with offset detector

Sungho Yun; Dain Choi; Sung-Joon Ye; Gyuseong Cho; Seungryong Cho

doi:10.1117/12.3006338

1 April 2024 Investigation on substantial asymmetry of HU value in dental cone-beam CT with offset detector

Sungho Yun, Dain Choi, Sung-Joon Ye, Gyuseong Cho, Seungryong Cho

Proceedings Volume 12925, Medical Imaging 2024: Physics of Medical Imaging; 129253K (2024) https://doi.org/10.1117/12.3006338
Event: SPIE Medical Imaging, 2024, San Diego, California, United States

Conference Poster

Abstract

The short-scan trajectory in cone-beam CT (CBCT) imaging effectively decreases the scan time and the patient dose by excluding the redundant measurements. Also, the offset scan geometry improves the efficacy of the detector utilization by achieving the larger field-of-view (FOV) than the normal use. However, the asymmetric HU value recovery in the sinus of the patient has been consistently observed whenever we use the short-scan trajectory with offset detector. Typically, the reconstruction of short-scan CBCT with an offset detector may lead to inaccuracies in the CT attenuation values within the reconstructed image. This is particularly noticeable away from the beam center due to insufficient data consistency. Also, other physical factors (ex) beam-hardening, scattering effect) and truncation artifact due to the small FOV may contribute to asymmetric sinus representation. In this study, we investigate the potential causes of the asymmetric sinus representation through the artifact study. We used a Monte-Carlo (MC) simulation to reproduce asymmetric HU value for the ease artifact study.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Sungho Yun, Dain Choi, Sung-Joon Ye, Gyuseong Cho, and Seungryong Cho "Investigation on substantial asymmetry of HU value in dental cone-beam CT with offset detector", Proc. SPIE 12925, Medical Imaging 2024: Physics of Medical Imaging, 129253K (1 April 2024); https://doi.org/10.1117/12.3006338

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