Table 1. Specifications of the surgical navigation system.

System Features	Performance parameters
Chip area	EMCCD 1.3’’; COLOR CCD 2/3’’
Lens focal length	70-300mm
Working distance	600mm
Surgical field of view	79mmW*79mmH to 125mmW*125mmH
Sensor resolution (spatial)	1024*1024 imaging pixels
	13 x 13 μm pixels
	13.3 x 13.3 mm imaging area (optically centered)
Sensor resolution (temporal)	8.5fps(full frame),16.7fps(binning 2Xver)
Image windows	Visible, fluorescent, overlay