Striped ratio grids for scatter estimation

Scott S. Hsieh; Adam S. Wang; Josh Star-Lack

doi:10.1117/12.2216896

22 March 2016 Striped ratio grids for scatter estimation

Scott S. Hsieh, Adam S. Wang, Josh Star-Lack

Proceedings Volume 9783, Medical Imaging 2016: Physics of Medical Imaging; 97830J (2016) https://doi.org/10.1117/12.2216896
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

Abstract

Striped ratio grids are a new concept for scatter management in cone-beam CT. These grids are a modification of conventional anti-scatter grids and consist of stripes which alternate between high grid ratio and low grid ratio. Such a grid is related to existing hardware concepts for scatter estimation such as blocker-based methods or primary modulation, but rather than modulating the primary, the striped ratio grid modulates the scatter. The transitions between adjacent stripes can be used to estimate and subtract the remaining scatter. However, these transitions could be contaminated by variation in the primary radiation. We describe a simple nonlinear image processing algorithm to estimate scatter, and proceed to validate the striped ratio grid on experimental data of a pelvic phantom. The striped ratio grid is emulated by combining data from two scans with different grids. Preliminary results are encouraging and show a significant reduction of scatter artifact.

Citation Download Citation

Scott S. Hsieh, Adam S. Wang, and Josh Star-Lack "Striped ratio grids for scatter estimation", Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 97830J (22 March 2016); https://doi.org/10.1117/12.2216896

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