Navigator-Gated MR Angiography of the Renal Arteries: A Potential Screening Tool for Renal Artery Stenosis
| Autor: | Jeffrey H. Maki, Gregory J. Wilson, Romhild M. Hoogeveen, Juan A. Millan, William B. Eubank, David J. Glickerman |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male medicine.medical_specialty Renal Artery Obstruction Renal artery stenosis Sensitivity and Specificity Renal Artery medicine.artery Image Interpretation Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Screening tool cardiovascular diseases Renal artery Aged Aged 80 and over Kidney business.industry Mr angiography Reproducibility of Results General Medicine Steady-state free precession imaging Middle Aged Image Enhancement medicine.disease Predictive value eye diseases Stenosis medicine.anatomical_structure Female Radiology business Algorithms Magnetic Resonance Angiography |
| Zdroj: | American Journal of Roentgenology. 188:W540-W546 |
| ISSN: | 1546-3141 0361-803X |
| Popis: | 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.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.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%.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. |
| Databáze: | OpenAIRE |
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