A guide to human in vivo microcirculatory flow image analysis

Table 1 Comparison between SDF/IDF technical specifications

	Microscan (Microvision Medical B.V., Amsterdam, the Netherlands)		Capiscope HVCS (KK Technology, Honiton, UK)	Capiscope HVCS-HR^a (KK Technology)	Cytocam (Braedius Medical B.V., Huizen, the Netherlands)
Type	SDF		SDF	SDF	IDF
Image size (pixels)	720 × 480 (NTSC)	720 × 576 (PAL)	752 × 480	1280 × 1024	2208 × 1648
Resolution (μm/pixel)	1.45 (horizontal), 1.58 (vertical)^b		0.92	0.81	0.66^c
Field of view (μm)	1044 × 758 (NTSC)		692 × 442	1037 × 829	1457 × 1061
Frame rate (fps)	30 (NTSC)	25 (PAL)	Up to 87^d	25^d	25
Illumination time (ms)	10		0.5–2^d	0.5–2^d	2

^aCapiscope HVCS-HR uses the same camera, illumination, and optics as the Capiscope HVCS with a modified sensor and electronics
^bMeasured using an NTSC version and Canopus ADVC110 video digitizer
^cMeasured using a 150 line-pairs per inch Ronchi ruling (Edmund Optics, Barrington, NJ, USA)
^dPrivate communication with manufacturer
IDF incident dark field, NTSC national television system committee, PAL phase altering line, SDF sidestream dark field

ISSN: 1364-8535