Navigator Steady State Free Precession for Renal Artery Screening - Has the Time Come?
Maki J, Wilson G, Hoogeveen R, Eubank W, Glickerman D, Pipavath S, Millan J
Puget Sound VAHCS, University of Washington
Forty patients underwent navigator Steady State Free Precession (Nav SSFP) and contrast-enhanced (CE) renal artery MR angiography to evaluate Nav SSFP as a screening test to rule out renal artery stenosis (RAS). The incidence of RAS (>50%) by CE-MRA was 25%. Nav SSFP had a sensitivity of 100%, specificity of 80%, and negative predictive value of 100% for the detection of RAS. The perfect sensitivity in combination with high specificity makes Nav SSFP an ideal candidate for a fast, less-expensive, non-contrast screening test for renal artery stenosis.