Leica Microsystems has attained FDA 510(k) clearance for its FL560 fluorescence microscope filter for visualization of cerebrovascular blood flow in conjunction with the dye fluorescein. When integrated into a M530 OH6 neurosurgical microscope, FL560 fluorescence provides real-time, high-contrast visualization of both cerebral anatomy in native color and fluorescent blood flow. With this combined view, the surgeon has more information to aid assessment and decision-making during vascular neurosurgery. View of an arteriovenous malformation (AVM) viewed with FL560 fluorescence. Courtesy of Cleopatra Charalampaki / Cologne Medical Center, Germany. Leica Microsystems develops and manufactures microscopes and scientific instruments for the analysis of microstructures and nanostructures.