Relative intensities of thrombus-targeting fluorophores in femoral veins of FIX-deficient mice after electrolytic injury, showing fibrin (top graph) and platelet (bottom graph) accumulation during 60 minutes of thrombogenesis. Data points are from image analysis of video frames taken every 10 seconds, showing means and standard deviations (error bars), normalized for mouse weight and amount of preinjected fluorophore. Red lines show accumulation for mice preinjected with rFIX and PS antibody, and blue lines are for mice preinjected with rFIX only.