Table 2 Regurgitant fraction. In this retrospective study of 71 patients, Phase Contrast MRI at varying imaging planes was compared with Echocardiography to measure aortic regurgitation. Regurgitant Fraction on MRI correlates best with Echo when the numerator is measured below the aortic valve.

From: 301 Accurate quantification of aortic regurgitation: comparison of MRI with doppler echocardiography