Spiral CT of renal artery stenosis: comparison of three-dimensional rendering techniques.
PURPOSE: To evaluate the accuracy of computed tomographic (CT) angiography in the detection of renal artery stenosis (RAS). MATERIALS AND METHODS: CT angiography was performed in 31 patients undergoing conventional renal arteriography. CT angiographic data were reconstructed with shaded surface display (SSD) and maximum-intensity projection (MIP). Stenosis was graded with a four-point scale (grades 0-3). The presence of mural calcification, poststenotic dilatation, and nephrographic abnormalities was also noted. RESULTS: CT angiography depicted all main (n = 62) and accessory (n = 11) renal arteries that were seen at conventional arteriography. MIP CT angiography was 92% sensitive and 83% specific for the detection of grade 2-3 stenoses (> or = 70% stenosis). SSD CT angiography was 59% sensitive and 82% specific for the detection of grade 2-3 stenoses. The accuracy of stenosis grading was 80% with MIP and 55% with SSD CT angiography. Poststenotic dilatation and the presence of an abnormal nephrogram were 85% and 98% specific, respectively. CONCLUSION: CT angiography shows promise in the diagnosis of RAS. The accuracy of CT angiography varies with the three-dimensional rendering technique employed.
Duke Scholars
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Related Subject Headings
- Tomography, X-Ray Computed
- Sensitivity and Specificity
- Retrospective Studies
- Renal Artery Obstruction
- Renal Artery
- Observer Variation
- Nuclear Medicine & Medical Imaging
- Middle Aged
- Male
- Kidney
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Tomography, X-Ray Computed
- Sensitivity and Specificity
- Retrospective Studies
- Renal Artery Obstruction
- Renal Artery
- Observer Variation
- Nuclear Medicine & Medical Imaging
- Middle Aged
- Male
- Kidney