Effect of sensor directionality on photoacoustic imaging: a study using the k-wave toolbox

B. T. Cox, B. E. Treeby, Alexander A. Oraevsky, Lihong V. Wang
2010 Photons Plus Ultrasound: Imaging and Sensing 2010  
Most image reconstruction algorithms for biomedical photoacoustic tomography make the assumption that the optically-generated ultrasonic waves are recorded by pressure detectors with an omni-directional response. In other words, the detectors are assumed to sample the pressure field exactly at a point. In practice this is rarely the case as real detectors have a finite size and often respond not purely to pressure changes but to some combination of acoustic pressure and pressure gradient (or
more » ... er derivatives). This can make them less sensitive to pressure waves at some angles. The effect of this sensor directionality on photoacoustic tomography was considered here for the case of time-reversal image reconstruction. The ultrasound simulation toolbox k-Wave was used to perform the study.
doi:10.1117/12.841671 fatcat:5ko7nqhgubax7haypifpqyxnqi