Deconvolution based photoacoustic reconstruction for directional transducer with sparsity regularization

Hamid Moradi; Shuo Tang; Septimiu E. Salcudean

doi:10.1117/12.2212077

15 March 2016 Deconvolution based photoacoustic reconstruction for directional transducer with sparsity regularization

Hamid Moradi, Shuo Tang, Septimiu E. Salcudean

Proceedings Volume 9708, Photons Plus Ultrasound: Imaging and Sensing 2016; 97082D (2016) https://doi.org/10.1117/12.2212077
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

We define a deconvolution based photoacoustic reconstruction with sparsity regularization (DPARS) algorithm for image restoration from projections. The proposed method is capable of visualizing tissue in the presence of constraints such as the specific directivity of sensors and limited-view Photoacoustic Tomography (PAT). The directivity effect means that our algorithm treats the optically-generated ultrasonic waves based on which direction they arrive at the transducer. Most PA image reconstruction methods assume that sensors have omni-directional response; however, in practice, the sensors show higher sensitivity to the ultrasonic waves coming from one specific direction. In DPARS, the sensitivity of the transducer to incoming waves from different directions are considered. Thus, the DPARS algorithm takes into account the relative location of the absorbers with respect to the transducers, and generates a linear system of equations to solve for the distribution of absorbers. The numerical conditioning and computing times are improved by the use of a sparse Discrete Fourier Transform (DCT) representation of the distribution of absorption coefficients. Our simulation results show that DPARS outperforms the conventional Delay-and-Sum reconstruction method in terms of CNR and RMS errors. Experimental results confirm that DPARS provides images with higher resolution than DAS.

Conference Presentation

Citation Download Citation

Hamid Moradi, Shuo Tang, and Septimiu E. Salcudean "Deconvolution based photoacoustic reconstruction for directional transducer with sparsity regularization", Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 97082D (15 March 2016); https://doi.org/10.1117/12.2212077

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