Application of a new sensing principle for photoacoustic imaging of point absorbers

Zafer Doğan; Ivana Jovanovic; Thierry Blu; Dimitri Van De Ville

doi:10.1117/12.2005063

4 March 2013 Application of a new sensing principle for photoacoustic imaging of point absorbers

Zafer Doğan, Ivana Jovanovic, Thierry Blu, Dimitri Van De Ville

Proceedings Volume 8581, Photons Plus Ultrasound: Imaging and Sensing 2013; 85813Z (2013) https://doi.org/10.1117/12.2005063
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Photoacoustic tomography (PAT) is a hybrid imaging method, which combines ultrasonic and optical imaging modalities, in order to overcome their respective weaknesses and to combine their strengths. It is based on the reconstruction of optical absorption properties of the tissue from the measurements of a photoacoustically generated pressure field. Current methods consider laser excitation, under thermal and stress confinement assumptions, which leads to the generation of a propagating pressure field. Conventional reconstruction tech niques then recover the initial pressure field based on the boundary measurements by iterative reconstruction algorithms in time- or Fourier-domain. Here, we propose an application of a new sensing principle that allows for efficient and non-iterative reconstruction algorithm for imaging point absorbers in PAT. We consider a closed volume surrounded by a measurement surface in an acoustically homogeneous medium and we aim at recovering the positions and the amount of heat absorbed by these absorbers. We propose a two-step algorithm based on proper choice of so-called sensing functions. Specifically, in the first step, we extract the projected positions on the complex plane and the weights by a sensing function that is well-localized on the same plane. In the second step, we recover the remaining z-location by choosing a proper set of plane waves. We show that the proposed families of sensing functions are sufficient to recover the parameters of the unknown sources without any discretization of the domain. We extend the method for sources that have joint-sparsity; i.e., the absorbers have the same positions for different frequencies. We evaluate the performance of the proposed algorithm using simulated and noisy sensor data and we demonstrate the improvement obtained by exploiting joint sparsity.

Citation Download Citation

Zafer Doğan, Ivana Jovanovic, Thierry Blu, and Dimitri Van De Ville "Application of a new sensing principle for photoacoustic imaging of point absorbers", Proc. SPIE 8581, Photons Plus Ultrasound: Imaging and Sensing 2013, 85813Z (4 March 2013); https://doi.org/10.1117/12.2005063

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
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Absorption

Electroluminescent displays

Acquisition tracking and pointing

Reconstruction algorithms

Acoustics

Signal to noise ratio

Show All Keywords

Keywords/Phrases

Search In:

Publication Years