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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; Olsrud, Johan LU ; Brockstedt, Sara LU ; Albrechtsson, Ulf LU ; Norgren, Lars LU ; Ståhlberg, Freddy LU and Larsson, Elna-Marie LU (2000) In Journal of Magnetic Resonance Imaging 12(1). p.112-121
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
aneurysm, aortic, aorta, grafts and prostheses, MR imaging, safety, artifacts, blood, flow dynamics
in
Journal of Magnetic Resonance Imaging
volume
12
issue
1
pages
112 - 121
publisher
John Wiley & Sons
external identifiers
  • pmid:10931571
  • scopus:0033918324
ISSN
1522-2586
DOI
10.1002/1522-2586(200007)12:1<112::AID-JMRI13>3.0.CO;2-G
language
English
LU publication?
yes
id
19cbda62-1bba-482b-a0f4-7b9e661385c6 (old id 1117053)
date added to LUP
2008-07-02 15:50:38
date last changed
2017-01-01 05:05:42
@article{19cbda62-1bba-482b-a0f4-7b9e661385c6,
  abstract     = {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.},
  author       = {Engellau, Lena and Olsrud, Johan and Brockstedt, Sara and Albrechtsson, Ulf and Norgren, Lars and Ståhlberg, Freddy and Larsson, Elna-Marie},
  issn         = {1522-2586},
  keyword      = {aneurysm,aortic,aorta,grafts and prostheses,MR imaging,safety,artifacts,blood,flow dynamics},
  language     = {eng},
  number       = {1},
  pages        = {112--121},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Magnetic Resonance Imaging},
  title        = {MR evaluation ex vivo and in vivo of a covered stent-graft for abdominal aortic aneurysms: ferromagnetism, heating, artifacts, and velocity mapping},
  url          = {http://dx.doi.org/10.1002/1522-2586(200007)12:1<112::AID-JMRI13>3.0.CO;2-G},
  volume       = {12},
  year         = {2000},
}