An operational near-infrared fluorescence imaging system prototype for large animal surgery - PubMed (original) (raw)
An operational near-infrared fluorescence imaging system prototype for large animal surgery
A M De Grand et al. Technol Cancer Res Treat. 2003 Dec.
Free article
Abstract
Near-infrared (NIR) fluorescence imaging has the potential to revolutionize human cancer surgery by providing sensitive, specific, and real-time intraoperative visualization of normal and disease processes. We have previously introduced the concept of a low-cost, safe, and easy-to-use NIR fluorescence imaging system that permits the surgeon to "see" surgical anatomy and NIR fluorescence simultaneously, non-invasively, with high spatial resolution, in real-time, and without moving parts. In this study, we present an operational prototype designed specifically for use during large animal surgery. Such a system serves as a foundation for future clinical studies. We discuss technical considerations, and provide details of the implementation of subsystems related to excitation light, light collection, computer, and software. Using the prototype, and the clinically available NIR fluorophore indocyanine green, we demonstrate vascular imaging in 35 kg pigs. Cancer-specific applications of this imaging system include image-guided cancer resection with real-time assessment of surgical margins, image-guided sentinel lymph node mapping, intraoperative mapping of tumor and normal vasculature, image-guided avoidance of critical structures such as nerves, and intraoperative detection of occult metastases in the surgical field. Taken together, this study describes an optical imaging system engineered for eventual translation to the clinic.
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