MRI after implantation of a novel femoral closure device following intra-arterial catheterisation: implications for subsequent contrast-enhanced MR angiography
| Autor: | Hans-Ulrich Kauczor, Thomas Voigtlaender, Oliver K. Mohrs, Steffen E. Petersen, Bernd Nowak |
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| Rok vydání: | 2009 |
| Předmět: |
Gadolinium DTPA
Male medicine.medical_specialty Contrast Media Lumen (anatomy) Coronary Disease Femoral artery Coronary Angiography Imaging phantom Electrocardiography medicine.artery Image Processing Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Vascular Patency Aged Neuroradiology Aged 80 and over medicine.diagnostic_test Phantoms Imaging business.industry Ultrasound Interventional radiology General Medicine Middle Aged medicine.disease Hemostasis Surgical Femoral Artery body regions Stenosis Linear Models Female Radiology Artifacts business Blood Flow Velocity Magnetic Resonance Angiography |
| Zdroj: | European Radiology. 20:1277-1283 |
| ISSN: | 1432-1084 0938-7994 |
| Popis: | To assess MRI safety aspects and artefacts of a novel femoral artery closure device during contrast-enhanced MR angiography in patients following intra-arterial catheterisation.Ten consecutive patients underwent MRI within 24 h of coronary angiography and placement of a femoral artery closure device. We used a T2-weighted gradient-echo MRI sequence to measure the device-related artefact size in comparison with a phantom image, phase-contrast flow measurement proximal to, at the level of and distal to the device to quantify potential differences in flow velocity and contrast-enhanced 3D gradient-echo MR angiography to differentiate potential femoral artery stenosis from device-related artefacts.The mean size of the oval-shaped artefact was 8.4 x 6.6 mm (+/-1.0 x 0.8 mm) and was almost identical to the maximum artefact size of the phantom measurement (8.3 x 5.7 mm). Device placement did not result in an increased peak velocity (proximal 69 +/- 23 cm/s, at the level of 64 +/- 11 cm/s and distal to the device 63 +/- 12 cm/s, p = 0.67). The mean artefact penetration into the vessel lumen was 0.5 +/- 0.5 mm (percentage vessel narrowing 7.0 +/- 6%; range 0-16%).The MR conditional StarClose femoral artery closure device was used safely within 24 h of deployment at 1.5 T. Despite clip-related artefacts MR angiography will allow for easy differentiation of clip-related artefacts from high-grade atherosclerotic stenosis. |
| Databáze: | OpenAIRE |
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