Analysis of Reconstruction Errors in Optoacoustic Tomography with Negatively Focused Ultrasound Detectors

source: © 2018 Optical Society of America

We analyze the response of negatively focused acoustic detectors in both time and frequency domains and show how the approximations made in the virtual detector approach lead to image distortion and artifacts.
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Fig. 2. Simulated reconstruction results with a negatively focused detector for circular symmetry of (a) Gaussian absorbers of various sizes obtained
using (b) model-based reconstruction with the virtual-detector approach (c) and the exact model matrix that includes the response of the detector.
(d) Comparison of the reconstructed amplitude of the Gaussian sources by the virtual detector approach (Fig. 3b) as a function of their diameter,
and the prediction of the d model shown in Fig. 2.

G. Drozdov and A. Rosenthal, “Analysis of reconstruction errors in optoacoustic tomography with negatively focused ultrasound detectors,” in Biophotonics Congress: Biomedical Optics Congress 2018 (Microscopy/Translational/Brain/OTS), OSA Technical Digest (Optical Society of America, 2018), paper OW4D.6.