Table 1.

Performance benchmarks of representative PA imaging systems. PA, photoacoustic; OR-PAM, optical resolution photoacoustic microscopy; AR-PAM, acoustic resolution photoacoustic microscopy; PACT, photoacoustic computed tomography; FOV, field of view.

Type	Lateral Resolution	Axial Resolution	Imaging Depth	Imaging Time	FOV	Ref.
OR-PAM	2.56 μm	-	1.2 mm	70 min	7.8 × 10 mm2	[31]
	3.6 μm	27.7 μm	1 mm	7 s	9 × 4 mm2	[34]
	2.7 μm	46.4 μm	400 μm	4 min	6 × 8 mm2	[35]
AR-PAM	590 μm	150 μm	25 mm	20 min	60 × 32 mm2	[39]
	45 μm	33 μm	7.6 mm	10 min	9 × 7 mm2	[40]
	84 μm	38 μm	2.3 mm	224 s	36 × 80 mm2	[41]
PACT	250 μm	100 μm	13 mm	16 s	25 × 30 mm2	[42]
	1.5 mm	-	10 mm	0.1 s	20 × 20 mm2	[44]
	1.2 mm	205 μm	30 mm	0.2 s	40 × 60 mm2	[27]