Figure 2.
Photoacoustic (PA) imaging system and application in the medical field: (a) Linear-array photoacoustic tomography (PAT) of methylene blue concentration in a rat sentinel lymph node (SLN), (b) circular array PAT of cerebral hemodynamic changes in a rat, and (c) photoacoustic endoscopy (PAE) of a rabbit esophagus. UST: ultrasound transducer. (d) Optical resolution photoacoustic microscopy (OR-PAM) used for quantification of oxygen saturation in a mouse ear. (e) Acoustic resolution photoacoustic microscopy (AR-PAM) of normalized total hemoglobin concentration in a human palm [16]. Adapted with permission from ref. [16].