Figure 1

Cine phase-contrast imaging. (a) and (b) Initial acquisition of scout images enabling localization of renal arteries (white arrows); (c) Sagittal image of the renal artery on phase compensated image (white arrow); (d) phase contrast image of the renal artery (white arrow) at the same level; (e) and (f) magnified views of (c) and (d) where the investigator has placed a region of interest over the renal artery; (g) time intensity curve for one RR interval; h: the area under the curve multiplied by the heart rate approximates the renal blood flow.