Figure 8.

(A) In vivo US/PA B-scan images of a rat brain at +1 mm from the bregma, captured using the developed PA system. (B) US/PA B-scan images were acquired at excitation wavelengths of 750 nm and 850 nm. (C) Overlaid US/PA B-scan images of the rat brain. Solid yellow arrows indicate cerebral blood vessels. US, ultrasound; PA, photoacoustic; PA750, PA signal at a 750-nm excitation wavelength; PA850, PA signal at an 850-nm excitation wavelength; MCA, middle cerebral artery; SSS, superior sagittal sinus.