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Calculating Relative Lung Perfusion Using Fluoroscopic Sequences and Image Analysis: The Fluoroscopic Flow Calculator

Circulation: Cardiovascular Interventions

Circulation: Cardiovascular Interventions, Ahead of Print. Currently, measurement of relative pulmonary perfusion can only be performed outside the catheterization laboratory. Inclusion criteria were nonselective angiogram of pulmonary vasculature, oblique angulation ≤20°, and an adequate view of both lung fields.