The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform
Peter M T Pattynama - One of the best experts on this subject based on the ideXlab platform.
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hemodynamic significance of renal artery stenosis Digital Subtraction Angiography versus systolically gated three dimensional phase contrast mr Angiography
Radiology, 1997Co-Authors: Martin N J M Wasser, Jos J M Westenberg, V P M Van Der Hulst, J M Van Baalen, J H Van Bockel, A R Van Erkel, Peter M T PattynamaAbstract:PURPOSE: To compare Digital Subtraction Angiography with three-dimensional phase-contrast magnetic resonance (MR) Angiography in detection of significant renal artery stenosis. MATERIALS AND METHODS: Sixteen patients underwent Digital Subtraction Angiography and systolically gated three-dimensional phase-contrast MR Angiography within 1 week. Scoring of stenosis on MR angiograms was based on presence and length of a flow void and quality of flow signal intensity in the distal part of the artery. Intraarterial pressure measurement was the reference standard for hemodynamically significant renal artery stenosis. RESULTS: MR Angiography depicted two of five patent accessory arteries. Comparison of Digital Subtraction Angiography and MR Angiography with intraarterial pressure measurements was possible in 25 main renal arteries. In 13 arteries, a pressure gradient of more than 15 mm Hg was found. Digital Subtraction Angiography depicted 10 of these stenoses (sensitivity, 77%; specificity, 92%). A flow void was...
Siegfried Thurnher - One of the best experts on this subject based on the ideXlab platform.
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peripheral vascular occlusive disease evaluation with contrast enhanced moving bed mr Angiography versus Digital Subtraction Angiography in 106 patients
American Journal of Roentgenology, 2002Co-Authors: Christian Loewe, Maria Schoder, Thomas Rand, Udo Hoffmann, Johannes Sailer, Thomas Kos, Johannes Lammer, Siegfried ThurnherAbstract:OBJECTIVE. The purpose of our study was to compare contrast-enhanced moving-bed MR Angiography and Digital Subtraction Angiography in the evaluation of peripheral vascular occlusive disease.MATERIALS AND METHODS. This retrospective report includes 106 patients (45 women, 61 men) with known or suspected peripheral vascular occlusive disease who underwent MR Angiography and intraarterial Digital Subtraction Angiography of the peripheral arteries. MR Angiography was performed on a 1.0-T unit using a moving-bed technique. Every leg was divided into 14 vascular segments, and severity of disease was scored in four categories. Digital Subtraction Angiography was the standard of reference.RESULTS. In the 106 patients, 2378 vessel segments were evaluated with both imaging modalities. In 2156 segments, MR Angiography and Digital Subtraction Angiography were concordant for stenosis classification, in 188 segments the two modalities differed in one category, and in 24 segments they differed in two categories. MR angi...
Martin N J M Wasser - One of the best experts on this subject based on the ideXlab platform.
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hemodynamic significance of renal artery stenosis Digital Subtraction Angiography versus systolically gated three dimensional phase contrast mr Angiography
Radiology, 1997Co-Authors: Martin N J M Wasser, Jos J M Westenberg, V P M Van Der Hulst, J M Van Baalen, J H Van Bockel, A R Van Erkel, Peter M T PattynamaAbstract:PURPOSE: To compare Digital Subtraction Angiography with three-dimensional phase-contrast magnetic resonance (MR) Angiography in detection of significant renal artery stenosis. MATERIALS AND METHODS: Sixteen patients underwent Digital Subtraction Angiography and systolically gated three-dimensional phase-contrast MR Angiography within 1 week. Scoring of stenosis on MR angiograms was based on presence and length of a flow void and quality of flow signal intensity in the distal part of the artery. Intraarterial pressure measurement was the reference standard for hemodynamically significant renal artery stenosis. RESULTS: MR Angiography depicted two of five patent accessory arteries. Comparison of Digital Subtraction Angiography and MR Angiography with intraarterial pressure measurements was possible in 25 main renal arteries. In 13 arteries, a pressure gradient of more than 15 mm Hg was found. Digital Subtraction Angiography depicted 10 of these stenoses (sensitivity, 77%; specificity, 92%). A flow void was...
Christian Loewe - One of the best experts on this subject based on the ideXlab platform.
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peripheral vascular occlusive disease evaluation with contrast enhanced moving bed mr Angiography versus Digital Subtraction Angiography in 106 patients
American Journal of Roentgenology, 2002Co-Authors: Christian Loewe, Maria Schoder, Thomas Rand, Udo Hoffmann, Johannes Sailer, Thomas Kos, Johannes Lammer, Siegfried ThurnherAbstract:OBJECTIVE. The purpose of our study was to compare contrast-enhanced moving-bed MR Angiography and Digital Subtraction Angiography in the evaluation of peripheral vascular occlusive disease.MATERIALS AND METHODS. This retrospective report includes 106 patients (45 women, 61 men) with known or suspected peripheral vascular occlusive disease who underwent MR Angiography and intraarterial Digital Subtraction Angiography of the peripheral arteries. MR Angiography was performed on a 1.0-T unit using a moving-bed technique. Every leg was divided into 14 vascular segments, and severity of disease was scored in four categories. Digital Subtraction Angiography was the standard of reference.RESULTS. In the 106 patients, 2378 vessel segments were evaluated with both imaging modalities. In 2156 segments, MR Angiography and Digital Subtraction Angiography were concordant for stenosis classification, in 188 segments the two modalities differed in one category, and in 24 segments they differed in two categories. MR angi...
V P M Van Der Hulst - One of the best experts on this subject based on the ideXlab platform.
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hemodynamic significance of renal artery stenosis Digital Subtraction Angiography versus systolically gated three dimensional phase contrast mr Angiography
Radiology, 1997Co-Authors: Martin N J M Wasser, Jos J M Westenberg, V P M Van Der Hulst, J M Van Baalen, J H Van Bockel, A R Van Erkel, Peter M T PattynamaAbstract:PURPOSE: To compare Digital Subtraction Angiography with three-dimensional phase-contrast magnetic resonance (MR) Angiography in detection of significant renal artery stenosis. MATERIALS AND METHODS: Sixteen patients underwent Digital Subtraction Angiography and systolically gated three-dimensional phase-contrast MR Angiography within 1 week. Scoring of stenosis on MR angiograms was based on presence and length of a flow void and quality of flow signal intensity in the distal part of the artery. Intraarterial pressure measurement was the reference standard for hemodynamically significant renal artery stenosis. RESULTS: MR Angiography depicted two of five patent accessory arteries. Comparison of Digital Subtraction Angiography and MR Angiography with intraarterial pressure measurements was possible in 25 main renal arteries. In 13 arteries, a pressure gradient of more than 15 mm Hg was found. Digital Subtraction Angiography depicted 10 of these stenoses (sensitivity, 77%; specificity, 92%). A flow void was...