A photoacoustic image reconstruction method for point source recovery
In this paper, a novel Delay and Glow (DAG), back projection-based photoacoustic reconstruction, for point source recovery is presented. The projections of the absorber coefficients are delayed and weighed based on the transducer directivity sensitivity and matched with the other projections from other transducer elements leading to glow the point source at the exact location. The DAG was tested with 2-D experimental and simulation studies and compared with conventional delay and sum (DAS) reconstruction method. The proposed algorithm outperforms the DAS in terms of contrast to noise ratio (CNR) and RMS errors.