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MR evaluation ex vivo and in vivo of a covered stent-graft for abdominal aortic aneurysms: ferromagnetism, heating, artifacts, and velocity mapping

Engellau, Lena (författare)
Olsrud, Johan, (författare)
Lunds universitet, Lund University, Medicinska fakulteten, Faculty of Medicine, Institutionen för kliniska vetenskaper, Lund, Department of Clinical Sciences, Lund, Sektion V, Section V, Diagnostisk radiologi, Lund, Diagnostic Radiology, (Lund)
Brockstedt, Sara, (författare)
Lunds universitet, Lund University, Medicinska fakulteten, Faculty of Medicine, Institutionen för kliniska vetenskaper, Lund, Department of Clinical Sciences, Lund, Sektion V, Section V, Medicinsk strålningsfysik, Lund, Medical Radiation Physics, Lund
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Albrechtsson, Ulf, (författare)
Lunds universitet, Lund University, Medicinska fakulteten, Faculty of Medicine, Institutionen för kliniska vetenskaper, Lund, Department of Clinical Sciences, Lund, Sektion V, Section V, Diagnostisk radiologi, Lund, Diagnostic Radiology, (Lund)
Norgren, Lars, (författare)
Lunds universitet, Lund University, Medicinska fakulteten, Faculty of Medicine, Institutionen för kliniska vetenskaper, Malmö, Department of Clinical Sciences, Malmö
Ståhlberg, Freddy, (författare)
Lunds universitet, Lund University, Medicinska fakulteten, Faculty of Medicine, Institutionen för kliniska vetenskaper, Lund, Department of Clinical Sciences, Lund, Sektion V, Section V, Diagnostisk radiologi, Lund, Diagnostic Radiology, (Lund), Medicinsk strålningsfysik, Lund, Medical Radiation Physics, Lund
Larsson, Elna-Marie, (författare)
Lunds universitet, Lund University, Medicinska fakulteten, Faculty of Medicine, Institutionen för kliniska vetenskaper, Lund, Department of Clinical Sciences, Lund, Sektion V, Section V, Diagnostisk radiologi, Lund, Diagnostic Radiology, (Lund)
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2000
Engelska.
Ingår i: Journal of Magnetic Resonance Imaging. - John Wiley and Sons Inc.. - 1522-2586. ; 12:1, s. 112-121
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Magnetic resonance imaging (MRI) safety was evaluated at 1.5 T in a covered nickel titanium stent-graft (Vanguard) used for endovascular treatment of abdominal aortic aneurysms (AAAs). Imaging artifacts were assessed on MRI with contrast-enhanced (CE) three-dimensional (3D) MR angiography (MRA) and spiral computed tomography (CT) in 10 patients as well as ex vivo. Velocity mapping was performed in the suprarenal aorta and femoral arteries in 14 patients before and after stent-graft placement. For comparison it was also performed in six healthy volunteers. No ferromagnetism or heating was detected. Metal artifacts caused minimal image distortion on MRI/MRA. The artifacts disturbed image evaluation on CT at the graft bifurcation and graft limb junction. No significant differences in mean flow were found in patients before and after stent-graft placement. Our study indicates that MRI at 1.5 T may be performed safely in patients with the (Vanguard) stent-graft. MRI/MRA provides diagnostic image information. Velocity mapping is not included in our routine protocol.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)

Nyckelord

aneurysm
aortic
aorta
grafts and prostheses
MR imaging
safety
artifacts
blood
flow dynamics

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