MRI assessment of thoracic stent grafts after emergency implantation in multi trauma patients: a feasibility study
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Volker Rasche & Alexander Oberhuber & Stephan Trumpp & Axel Bornstedt & Karl-Heinz Orend & Nico Merkle &Wolfgang Rottbauer & Martin Hoffmann
- چاپ و سال / کشور: 2011
Description
Purpose To evaluate the feasibility of MRI for static and dynamic assessment of the deployment of thoracic aortic stent grafts after emergency implantation in trauma patients. Methods Twenty patients initially presenting with a rupture of the thoracic aorta were enrolled in this study. All patients underwent thoracic endovascular aortic repair (TEVAR). The deployment of the implanted stent graft was assessed by CTA and MRI, comprising the assessment of the aortic arch with and without contrast agent, and the assessment of the motion of the stent graft over the cardiac cycle. Results The stent graft geometry and motion over the cardiac cycle were assessable by MRI in all patients. Flowmediated signal variations in areas of flow acceleration could be well visualised. No statistically significant differences in stent-graft diameters were observed between CT and MRI measurements. Conclusion MRI appears to be a valuable tool for the assessment of thoracic stent grafts. It shows similar performance in the accurate assessment of stent-graft dimensions to the current gold standard CTA. Its capability of providing additional functional information and the lack of ionising radiation and nephrotoxic contrast agents may make MRI a valuable tool for monitoring patients after TEVAR.
Eur Radiol (2011) 21:1397–1405 DOI 10.1007/s00330-011-2074-x Received: 4 October 2010 / Revised: 13 December 2010 / Accepted: 15 December 2010 / Published online: 18 February 2011
