Investigation of priors mismatch in ultrasound tomographic reconstruction

Diego Armando Cardona Cardenas; Sergio Shiguemi Furuie

doi:10.1117/12.2293409

6 March 2018 Investigation of priors mismatch in ultrasound tomographic reconstruction

Diego Armando Cardona Cardenas, Sergio Shiguemi Furuie

Proceedings Volume 10580, Medical Imaging 2018: Ultrasonic Imaging and Tomography; 1058019 (2018) https://doi.org/10.1117/12.2293409
Event: SPIE Medical Imaging, 2018, Houston, Texas, United States

Abstract

Despite Ultrasound Tomography (USCT) not being ionizing and having low cost, it faces several challenges due to the physical nature of ultrasound interaction and propagation on the medium. One common strategy of diverse USCT-algorithms is to initialize with a-priori anatomical information of the region to be reconstructed, but the effect of this initialization is not clear. To contribute in this topic, our work presents, on simulated medium, a study of how the modification in this initialization (value and area) affects the USCT convergence and the generated image quality. In this study, the following were used: Distorted Born Iterative Method (DBIM) as the USCT-algorithm; a Matlab Toolbox (k-wave) for the forward problem; and the Algebraic Reconstruction Technique for the inverse problem. All simulated objects have equal density and attenuation, and the sound speed is varied between 1400 and 1680m/s. The initial attributes of Ob1, the largest object and with slowest velocity, are varied (c_ob1 ± [0; 40; 80; 120]m/s and Area_ob1 ± [0%; 15%; 25%]). In all simulations 64 transducers(100kHz) uniformly distributed around the medium were used. The results, measured by Relative-Residual-Error and the Normalized-Root-Mean-Square-Error show, for all investigated areas, that convergence is better when the initialization velocity is set with higher than expected speed. Additionally, the RRE is higher for augmented area than for decreased area. For reconstruction quality, the NRMSE is also higher for augmented initial area than for small area. The investigation, based on simulations, suggests that when the contour of cold object is inaccurate, it is preferable to use smaller area such as its internal contour as prior region.

Citation Download Citation

Diego Armando Cardona Cardenas and Sergio Shiguemi Furuie "Investigation of priors mismatch in ultrasound tomographic reconstruction", Proc. SPIE 10580, Medical Imaging 2018: Ultrasonic Imaging and Tomography, 1058019 (6 March 2018); https://doi.org/10.1117/12.2293409

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