Fig. 6.

Three-dimensional TP-PA imaging. (a) Volumetric visualization of the Rhodamine B filled a quartz capillary tube, which consists 30 stacked $x\text{-}y$ plane images. The blue outline represents the boundary of the quartz capillary tube, (b) $x\text{-}z$ section of the capillary tube extracted from the volumetric data set shown in panel (a). Scale bar: 100 μm.