MRI Artifacts of a Metallic Stent Derived From a Human Aorta Specimen

Journal Article · Tue Dec 07 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3531591· OSTI ID:21506968

Soto, M E ^[1]; Flores, P ^[2]; Marrufo, O; Hidalgo, S S; Rodriguez, A O ^[3]

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1. Departamento de Inmunologia, Instituto Nacional de Cardiologia, 14080 Mexico DF (Mexico)
2. Departamento de Instrumentacion Electromecanica, Instituto Nacional de Cardiologia, 14080 Mexico DF (Mexico)
3. Departamento de Ingenieria Electrica, Universidad Autonoma Metropolitana, Iztapalapa, 09340 (Mexico)

Magnetic resonance imaging has proved to be a useful technique to get images of the whole body. However, the presence of ferromagnetic material can cause susceptibility artifacts, which result from microscopic gradients that occur near the boundaries between areas displaying different magnetic susceptibility. These gradients cause dephasing of spins and frequency shifts in the surrounding tissues. Intravoxel dephasing and spatial mis-registration can degrade image quality. An aorta with a metallic stent was preserved in formaldehyde at 10% inside acrylic cylinders and used to obtain MR images. We tested pulsed spin echo and gradient echo sequences to improve image quality. All experiments were performed on a 7T/21 cm Varian system (Varian, Inc, Palo Alto, CA) equipped with Direct Drive technology and a 16-rung birdcage coil transceiver. The presence of metallic stents produces a lack of signal that might give falsely reassuring appearances within the vessel lumen.

• OSTI ID: 21506968
• Journal Information: AIP Conference Proceedings, Vol. 1310, Issue 1; Conference: 11. Mexican symposium on medical physics, Mexico City (Mexico), 19-22 Mar 2010; Other Information: DOI: 10.1063/1.3531591; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
AORTA
FERROMAGNETIC MATERIALS
FORMALDEHYDE
IMAGES
MAGNETIC SUSCEPTIBILITY
NMR IMAGING
SPIN
SPIN ECHO
ALDEHYDES
ANGULAR MOMENTUM
ARTERIES
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
ORGANIC COMPOUNDS
ORGANS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES