Fig. 4: Longitudinal vascular imaging in healthy volunteers.
From: Predictive modeling of chronic foot ulcer outcomes using longitudinal photoacoustic imaging
(a1–a6) Multi-view initial scan of Healthy Volunteer 1; (b1–b6) corresponding follow-up scan of the same subject. (c1–c6) Initial scan of Healthy Volunteer 2; (d1–d6) corresponding follow-up scan of the same subject. Yellow arrows highlight corresponding vessel segments across the two time points in healthy feet. The color map encodes relative axial depth, with blue indicating superficial vessels (0 mm) and red indicating the deepest reconstructed vessels (40 mm). Brighter colors represent higher photoacoustic signal amplitude, whereas darker colors indicate lower signal amplitude. All images demonstrate consistent vascular structures and minimal variation across time points. Quantitative feature changes are summarized on the right.
