Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT

Lifeng Yu; Armando Manduca; Megan Jacobsen; Joshua D. Trzasko; Joel G. Fletcher; David R. DeLone; Cynthia H. McCollough

doi:10.1117/12.845403

22 March 2010 Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT

Lifeng Yu, Armando Manduca, Megan Jacobsen, Joshua D. Trzasko, Joel G. Fletcher, David R. DeLone, Cynthia H. McCollough

Author Affiliations +

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76222O (2010) https://doi.org/10.1117/12.845403
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

We have recently developed a locally-adaptive method for noise control in CT based upon bilateral filtering. Different from the previous adaptive filters, which were locally adaptive by adjusting the filter strength according to local photon statistics, our use of bilateral filtering in projection data incorporates a practical CT noise model and takes into account the local structural characteristics, and thus can preserve edge information in the projection data and maintain the spatial resolution. Despite the incorporation of the CT noise model and local structural characteristics in the bilateral filtering, the noise-resolution properties of the filtered image are still highly dependent on predefined parameters that control the weighting factors in the bilateral filtering. An inappropriate selection of these parameters may result in a loss of spatial resolution or an insufficient reduction of noise. In this work, we employed an adaptive strategy to modulate the bilateral filtering strength according to the noise-equivalent photon numbers determined from each projection measurement. We applied the proposed technique to head/neck angiographic CT exams, which had highly non-uniform attenuation levels during the scan. The results demonstrated that the technique can effectively reduce the noise and streaking artifacts caused by high attenuation, while maintaining the reconstruction accuracy in less attenuating regions.

Citation Download Citation

Lifeng Yu, Armando Manduca, Megan Jacobsen, Joshua D. Trzasko, Joel G. Fletcher, David R. DeLone, and Cynthia H. McCollough "Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76222O (22 March 2010); https://doi.org/10.1117/12.845403

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