The Preoperative Administration of ICG Improves Tumor Detection in Patients Undergoing Minimally Invasive Hepatic Resection Guided by Conventional Intraoperative Ultrasound.

Indocyanine green has a sharply defined spectral peak absorption of near-infrared light at 800 nm in blood plasma or blood. This is the same wavelength at which the optical density of oxygenated hemoglobin in blood approximately equals that of reduced hemoglobin. Therefore, this coincidental light absorption makes it possible to measure indocyanine green concentrations in blood, plasma and serum in terms of its optical density at 800 nm, independent of variations in oxygen saturation level