The FL800 integrated neurovascular fluorescence device is used in conjunction with an ICG (Indocyanine Green) fluorescence agent to view cerebrovascular blood flow. Designed to provide video angiography in the cerebrovascular area, this vascular fluorescence procedure is very straightforward. Once the ICG agent is injected intravenously into the patient, the surgeon presses one button. The special NIR camera then picks up the fluorescent signal and displays it to the surgeon in real time. In addition, the Leica FL800 records the imaging as a special video loop so the surgeon can review the image later in surgery for comparison purposes. This procedure can be repeated six times in a single surgery so the surgeon can track the effects of the surgical procedure on blood flow in the brain and confirm patency.