Fig. 3
From: Improvement in resolution of fiber-laser photoacoustic tomography based on a virtual-point concept

a Schematic of a virtual point detector for SAFT. b Focusing geometry for the SAFT to calculate the time delay ∆ti
From: Improvement in resolution of fiber-laser photoacoustic tomography based on a virtual-point concept
a Schematic of a virtual point detector for SAFT. b Focusing geometry for the SAFT to calculate the time delay ∆ti