Coremans, J.M.

fluorescence tissue heart reflectance intensity fnadh /r ratio blood change light effect nadh fluorescence fnadh excitation tyrode ratio oxygenated oximetric hemoglobin rat heart measurement hemodynamic nadh fluorescence intensity perfusion absorption chance image nadh fluorescence intensities oxygenated tyrode uv reflectance intensity state heart tissue property method fluorimetry protocol sample wavelength excitation light intralipid tissue phantoms tissue areas uv reflectance intensities oximetric effect hypoxia deoxygenated nadh fluorimetry concentration hypoxic hypoxia oximetric changes oximetric effects hypoxic surface erythrocyte coreman uv reflectance images mitochondrial redox state uv excitation light volume mayevsky reflectance measurements 586 nm physiol system contribution filter blood-perfused suspension isosbestic brain nadh concentration perfusate blood-perfused rat heart myoglobin uv reflectance change tissue area difference oxygenated blood perfused phantom analysis