| Title | Navigator-gated MR angiography of the renal arteries: a potential screening tool for renal artery stenosis. | | Author(s) | Maki JH, Wilson GJ, Eubank WB, Glickerman DJ, Millan JA, Hoogeveen RM | | Institution | Department of Radiology (S113), University of Washington, Puget Sound VA Health Care System, 1660 S Colombian Way, Seattle, WA 98108, USA. jamki@u.washington.edu | | Source | AJR Am J Roentgenol 2007 Jun; 188(6):W540-6. | | MeSH | Adult
Aged
Aged, 80 and over
Algorithms
Female
Humans
Image Enhancement
Image Interpretation, Computer-Assisted
Magnetic Resonance Angiography
Male
Middle Aged
Renal Artery
Renal Artery Obstruction
Reproducibility of Results
Sensitivity and Specificity
| | Abstract | OBJECTIVE: The purpose of our study was to determine how well unenhanced navigator-gated steady-state free precession (Nav SSFP) MR angiography (MRA) performs as a screening test for the detection of renal artery stenosis.
SUBJECTS AND METHODS: Forty patients referred to rule out renal artery stenosis were imaged using an optimized Nav SSFP MRA sequence before conventional contrast-enhanced MRA (CE-MRA). Two radiologists evaluated Nav SSFP for maximum stenosis measurement, and comparison was made with CE-MRA results.
RESULTS: Fifteen of the 40 patients had greater than 50% renal artery stenosis as determined on CE-MRA. Sensitivity for detecting renal artery stenosis with Nav SSFP was 100%; specificity, 84%; negative predictive value, 100%; and positive predictive value, 79%. The average mean stenosis difference between Nav SSFP and CE-MRA was 10% +/- 9%.
CONCLUSION: Sensitivity and negative predictive value for the detection of renal artery stenosis using Nav SSFP were perfect, with an acceptable specificity of 84%. This suggests Nav SSFP is a promising technique for simple unenhanced screening for the detection of renal artery stenosis. | | Language | eng | | Pub Type(s) | Evaluation Studies
Journal Article
| | PubMed ID | 17515344 |
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