Fig. 4.

Validating sensitivity of multispectral RSOM. Dotted white box in Fig. 2 showing the area with individual vessels for tracking the (A) Hb, HbO2 and HbT signals and (B) rsO₂ values in one small area in one representative subject over the time points. Time points (i) to (iv) corresponds to venous occlusion challenge with time point iv representing release of the occlusion. Time points (iv) to (vii) corresponds to arterial occlusion challenge with time point vii representing release of the occlusion.