Image reconstruction in optoacoustic tomography for dispersive acoustic media.
Conventional image reconstruction methods for optoacoustic tomography (OAT) assume an idealized, non-dispersive acoustic medium. However, the linear attenuation coefficient and the phase velocity of acoustic waves propagating in soft tissue depend on temporal frequency and satisfy a known dispersion law. These frequency-dependent effects are incorporated into an optoacoustic wave equation, and a corresponding reconstruction method for OAT is developed. The improvement in image fidelity that can be achieved over conventional reconstruction methods is demonstrated by use of computer-simulation studies.
Department of Radiology, University of Chicago, 5841 South Maryland Avenue, Chicago, Illinois 60637, USA. pjlarivi@midway.uchicago.edu
Patrick J
PJ
La Rivière
Jin
J
Zhang
Mark A
MA
Anastasio
D000162:Acoustics; D000465:Algorithms; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008954:Models, Biological; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D041623:Tomography, Optical Coherence / Q000379:methods*; D014463:Ultrasonography / Q000379:methods*; D014732:Vibration