Circular-scanning variance delay and sum algorithm for photoacoustic imaging
Year: 2025
Type: article
Abstract: Photoacoustic imaging (PAI) commonly uses the delay-and-sum (DAS) algorithm, which is fast but prone to artifacts. This work introduces variance delay-and-sum (VDAS), a novel algorithm for circular-array PAI that utilizes signal variance as a weighting factor. A high variance suggests a high probability of an optical absorber, significantly improving vasculature imaging. Numerical simulations and phantom/ ex-vivo mouse ear experiments demonstrate that VDAS enhances image quality, reduces artifacts, and maintains computational efficiency compared to other DAS-based methods.
Source: Biomedical Optics Express
DOI: 10.1364/boe.577910
Authors: Zhicheng Wang, Zijun Xi, Qian Song, Xiong Wang
Institution: ShanghaiTech University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,913
OpenAlex ID: W4415727734