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.
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.
Authors: L Van Hoe; D Vandermeulen; S Gryspeerdt; L Mertens; A L Baert; P Suetens; G Marchal; L Stockx Journal: Eur Radiol Date: 1996 Impact factor: 5.315
Authors: Bradley M Hemminger; Paul L Molina; Thomas M Egan; Frank C Detterbeck; Keith E Muller; Christopher S Coffey; Joseph K T Lee Journal: J Digit Imaging Date: 2005-06 Impact factor: 4.056
Authors: B B Ertl-Wagner; R Bruening; J Blume; R-T Hoffmann; S Mueller-Schunk; B Snyder; M F Reiser Journal: AJNR Am J Neuroradiol Date: 2006-01 Impact factor: 3.825
Authors: D S Ebert; D G Heath; B S Kuszyk; L Edwards; C D Shaw; J Kukla; T Bedwell; E K Fishman Journal: J Digit Imaging Date: 1998-08 Impact factor: 4.056
Authors: M T Farrés; J Lammer; W Schima; B Wagner; R Wildling; F Winkelbauer; S Thurnher Journal: Cardiovasc Intervent Radiol Date: 1996 Mar-Apr Impact factor: 2.740
Authors: Helmut Ringl; Ruediger Schernthaner; Marcel O Philipp; Sylvia Metz-Schimmerl; Christian Czerny; Michael Weber; Christian Gäbler; Andrea Steiner-Ringl; Philipp Peloschek; Christian J Herold; Wolfgang Schima Journal: Eur Radiol Date: 2009-05-14 Impact factor: 5.315