Figure 2
From: Accurate early prediction of tumour response to PDT using optical coherence angiography
OCA images of tumour and peri-tumourous perfused microvascular reaction at t = 24 hrs post PDT. (a) before PDT; (b) OCA example of a responder (no visible perfused vessels in the tumour, and extremely low PVD in peri-tumourous tissue); (c) OCA example of a non-responder (no perfused vessels inside the tumour, but many perfused vessels in peri-tumourous tissue). The tumour borders (indicated by dashed contours) were automatically segmented using machine learning pixel classification technique29.
