Physical model-based metal artifact reduction (MAR) scheme for a 3D cone-beam CT extremity imaging system

D. Yang; R. A. Senn; N. Packard; S. Richard; J. Yorkston

doi:10.1117/12.2006207

6 March 2013 Physical model-based metal artifact reduction (MAR) scheme for a 3D cone-beam CT extremity imaging system

D. Yang, R. A. Senn, N. Packard, S. Richard, J. Yorkston

Proceedings Volume 8668, Medical Imaging 2013: Physics of Medical Imaging; 86685T (2013) https://doi.org/10.1117/12.2006207
Event: SPIE Medical Imaging, 2013, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

In Cone Beam CT Imaging, metallic and other dense objects, such as implantable orthopedic appliances, surgical clips and staples, and dental fillings, are often acquired as part of the image dataset. These high-density, high atomic mass objects attenuate X-rays in the diagnostic energy range much more strongly than soft tissue or bony structures, resulting in photon starvation at the detector. In addition, signal behind the metal objects suffer from increased quantum noise, scattered radiation, and beam hardening. All of these effects combine to create nonlinearities which are further amplified by the reconstruction algorithm, such as conventional filtered back-projection (FBP), producing strong artifacts in the form of streaking. They reduce image quality by masking soft tissue structures, not only in the immediate vicinity of the dense object, but also throughout the entire image volume. A novel, physical-model-based, metal-artifact reduction scheme (MAR) is proposed to mitigate the metal-induced artifacts. The metal objects are segmented in the projection domain, and a physical model based method is adopted to fill in the segmented area. The FDK1 reconstruction algorithm is then used for the final reconstruction.

Citation Download Citation

D. Yang, R. A. Senn, N. Packard, S. Richard, and J. Yorkston "Physical model-based metal artifact reduction (MAR) scheme for a 3D cone-beam CT extremity imaging system", Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86685T (6 March 2013); https://doi.org/10.1117/12.2006207

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