Modeling acquisition geometries with improved super-resolution in digital breast tomosynthesis

Raymond J. Acciavatti; E. Paul Wileyto; Andrew D. A. Maidment

doi:10.1117/12.2216440

30 March 2016 Modeling acquisition geometries with improved super-resolution in digital breast tomosynthesis

Raymond J. Acciavatti, E. Paul Wileyto, Andrew D. A. Maidment

Proceedings Volume 9783, Medical Imaging 2016: Physics of Medical Imaging; 978363 (2016) https://doi.org/10.1117/12.2216440
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

Abstract

In digital breast tomosynthesis (DBT), a reconstruction is created from multiple x-ray projection images. Our previous work demonstrated that the reconstruction is capable of super-resolution (i.e., subpixel resolution) relative to the detector. In order for super-resolution to yield a reliable improvement in image quality, it should be achievable at all positions in the reconstruction. This paper demonstrates that super-resolution is not achievable at all depths, or at all heights above the breast support. For this purpose, a bar pattern phantom was imaged using a commercial DBT system. A goniometry stand was used to orient the long axis of the parallel bars along an oblique plane relative to the breast support. This setup allowed a single test frequency to be visualized over a continuous range of depths. The orientation of the test frequency was parallel to the direction of x-ray tube motion. An oblique reconstruction in the plane of the bar pattern phantom showed that the existence of super-resolution is depth-dependent. To identify design strategies for optimizing super-resolution, a theoretical model was then developed in which a test frequency higher than the alias frequency of the detector was simulated. Two design modifications that improve super-resolution are identified. In particular, it is shown that reducing the spacing between the x-ray source positions minimizes the number of depths lacking super-resolution. Additionally, introducing detector motion along the direction perpendicular to the breast support allows for more uniform super-resolution throughout the image volume. In conclusion, this work presents strategies for optimizing super-resolution in DBT.

Citation Download Citation

Raymond J. Acciavatti, E. Paul Wileyto, and Andrew D. A. Maidment "Modeling acquisition geometries with improved super-resolution in digital breast tomosynthesis", Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 978363 (30 March 2016); https://doi.org/10.1117/12.2216440

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
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Super resolution

Digital breast tomosynthesis

Breast

Fourier transforms

Motion models

X-rays

Show All Keywords

Keywords/Phrases

Search In:

Publication Years