Fig. 5.

a An MSOT system for in vivo human neck imaging. (i) A schematic and (ii) a photograph of an MSOT imaging probe for human carotid and thyroid. (iii) An MSOT image of human carotid artery. 1: Skin surface; 2: Common carotid artery; 3: Internal jugular vein; 4: External jugular vein. (iv) An MSOT image of a healthy human thyroid. T: Thyroid; C: Carotid artery; Tr: Trachea; s: sternocleidomastoid muscle; m: infrahyoid muscle. b An MSOT system for in vivo human peripheral vasculature imaging. (i) A photograph of an MSOT imaging probe for human peripheral vasculature. (ii) An MSOT image of microvasculature in a human foot. (iii) An MSOT image showing the oxygen saturation of vein and artery. (iv) An MSOT image showing the pulsatility of tibialis posterior artery. All images were reproduced with permission from Refs. [29, 47, 64]. MSOT Multi-spectral optoacoustic tomography; sO₂ oxygen saturation