Quantifying motion artifacts using a rotating phantom: insights towards dynamic musculoskeletal applications

Benymeen Keelson; Luca Buzzatti; Violeta Portero Lopez; Thierry Scheerlink; Gert Van Gompel; Erik Cattrysse; Johan de Mey; Jef Vandemeulebroucke; Nico Buls

doi:10.1117/12.2542159

16 March 2020 Quantifying motion artifacts using a rotating phantom: insights towards dynamic musculoskeletal applications

Benymeen Keelson, Luca Buzzatti, Violeta Portero Lopez, Thierry Scheerlink, Gert Van Gompel, Erik Cattrysse, Johan de Mey, Jef Vandemeulebroucke, Nico Buls

Author Affiliations +

Proceedings Volume 11312, Medical Imaging 2020: Physics of Medical Imaging; 1131230 (2020) https://doi.org/10.1117/12.2542159
Event: SPIE Medical Imaging, 2020, Houston, Texas, United States

Abstract

Dynamic Computed Tomography is a promising tool to investigate affections, predominantly of vascular and perivascular origin. Advances in CT technology are opening up the possibility to also evaluate musculoskeletal diseases using dynamic CT. Wide beam CT scanners have the potential to acquire images from the same anatomic area over lengths up to 16 cm. As such, detailed analysis of joint morphology and dynamic phenomena can be investigated. Based on image processing techniques, kinematics can then be obtained from these images. Motion artifacts are however a major concern in dynamic CT for musculoskeletal applications. Such artifacts are influenced by the acquisition protocol and the speed of motion. In this study, we designed a phantom that could rotate in the gantry of the CT in an attempt to quantify motion artifacts. Dynamic scans were obtained while the phantom was rotating at 720/s in the wide beam CT scanner. Visual inspection revealed two main types of artifacts: high intensity artifacts and blurring or distortion of the holes in the phantom. Two quantitative metrics were defined to assess the degree of motion artifacts induced by the rotation of the phantom. These metrics were used to compare two different dynamic CT acquisition protocols; cine and cardiac. Results showed that the cardiac protocol significantly preserved the original shape of the holes by as much as 75%±8 while that of cine was 62% ± 4. However, the cardiac protocol showed 2 times more pixels with high intensity spots than the cine protocol and that difference was significant.

Citation Download Citation

Benymeen Keelson, Luca Buzzatti, Violeta Portero Lopez, Thierry Scheerlink, Gert Van Gompel, Erik Cattrysse, Johan de Mey, Jef Vandemeulebroucke, and Nico Buls "Quantifying motion artifacts using a rotating phantom: insights towards dynamic musculoskeletal applications", Proc. SPIE 11312, Medical Imaging 2020: Physics of Medical Imaging, 1131230 (16 March 2020); https://doi.org/10.1117/12.2542159

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Computed tomography

Image segmentation

Distortion

Motion measurement

Kinematics

Pathology

Image quality

Show All Keywords

Keywords/Phrases

Search In:

Publication Years