Significance Photoacoustic imaging (PAI) enables the visualization of optical contrast with
ultrasonic imaging. It is a field of intense research, with great promise for clinical application …

Functional blood imaging can reflect tissue metabolism and organ viability, which is
important for life science and biomedical studies. However, conventional imaging modalities …

Imaging deep haemodynamics non-invasively remains a quest. Although optical imaging
techniques can be used to measure blood flow, they are generally limited to imaging …

Fibre optic sensors are well suited to measuring fluid flow in many contexts, and recently
there has been burgeoning interest in their application to direct, invasive measurement of …

Relying on the strong optical absorption of hemoglobin to pulsed laser energy,
photoacoustic microscopy provides morphological and functional information on …

Photoacoustic microscopy uses multiple wavelengths to measure concentrations of different
absorbers. The speed of sound limits the shortest wavelength switching time to sub …

We present a technique called photoacoustic vector-flow (PAVF) to quantify the speed and
direction of flowing optical absorbers at each pixel from acoustic-resolution PA images. By …

Non-invasive imaging of deep blood vessels for mapping hemodynamics remains an open
quest in biomedical optical imaging. Although pure optical imaging techniques offer rich …

The radial artery, one of the terminal branches of the forearm, is utilized for vascular access
and in various non-invasive measurement method, providing crucial medical insights …

Photoacoustic (PA) velocimetry holds the advantage of detecting ultrasound signals from
selective targets sensitive to specific wavelengths of light irradiation. In particular, it is …