Recent development of optical coherence tomography for preoperative diagnosis of esophageal malignancies

Table 1 Specification of optical coherence tomography devices

	OCT device
Manuscript	Type	Resolution		Diameter (mm)	Image acquisition rate (frame/s)
		Axial (μm)	Transverse (μm)
4	Probe	10	25		4
5	Probe	10	25	2.4	-
6, 7	Probe	10	-	2.5	2
2	Probe	11	30	1.5	4
3
33	Probe	5	-	1.8	4
34	Probe	Approximately 2	5.6	-	-
39	Probe	5	14	-	60
41	Probe-3D	5	15	-	60
10	Balloon (OFDI)	7	30	18	4
46	Balloon (VLE)	7	-	20	10

OCT: Optical coherence tomography; OFDI: Optical frequency-domain imaging; VLE: Volumetric laser endomicrography.