Learning-based sound speed estimation and aberration correction in linear-array photoacoustic imaging

arXiv:2306.11034v2 Announce Type: replace-cross
Abstract: Photoacoustic (PA) image reconstruction involves acoustic inversion that necessitates the specification of the speed of sound (SoS) within the medium of propagation. Due to the lack of information on the spatial distribution of the SoS within heterogeneous soft tissue, a homogeneous SoS distribution (such as 1540 m/s) is typically assumed in PA image reconstruction, similar to that of ultrasound (US) imaging. Failure to compensate the SoS variations leads to aberration artefacts, deteriorating the image quality. …

abstract array arxiv cs.cv distribution eess.iv image imaging information linear medium propagation sound spatial speed type