Fig. 5.

4D real-time photoacoustic imaging experiment where data acquisition and image reconstruction were performed in real time. Images were captured from a photoacoustic point-like source translated in the negative x-direction at a velocity of 0.40 mm/s. The interval between 3D photoacoustic images was 1.4 s and rate-limited by the data acquisition transfer speed, computational, and data storage overhead. The first row shows an xy-plane (z = 4 mm). The second row shows the same reconstruction in a zy-plane (x = 7 mm) and the third row displays an xz-plane (y = 11 mm). Each column represents the 3D image data acquired at a specific point in time (indicated along bottom).