<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Materials with high magnetic susceptibility cause local inhomogeneities in the main field of the magnetic resonance (MR) tomograph. These inhomogeneities lead to loss of phase coherence, and thus to a rapid loss of signal in the image. In our research we investigated inhomogeneous field of magnetic implants such as magnetic fibers, designed for inner suture during surgery. The magnetic field inhomogeneities were studied at low magnetic planar phantom, which was made from four thin strips of magnetic tape, arranged grid-wise. We optimized the properties of imaging sequences with the aim to find the best setup for magnetic fiber visualization. These fibers can be potentially exploited in surgery for internal stitches. Stitches can be visualized by the magnetic resonance imaging (MRI) method after surgery. This study shows that the imaging of magnetic implants is possible by using the low field MRI systems, without the use of complicated post processing techniques (e.g., IDEAL).</p></abstract>

Materials with high magnetic susceptibility cause local inhomogeneities in the main field of the magnetic resonance (MR) tomograph. These inhomogeneities lead to loss of phase coherence, and thus to a rapid loss of signal in the image. In our research we investigated inhomogeneous field of magnetic implants such as magnetic fibers, designed for inner suture during surgery. The magnetic field inhomogeneities were studied at low magnetic planar phantom, which was made from four thin strips of magnetic tape, arranged grid-wise. We optimized the properties of imaging sequences with the aim to find the best setup for magnetic fiber visualization. These fibers can be potentially exploited in surgery for internal stitches. Stitches can be visualized by the magnetic resonance imaging (MRI) method after surgery. This study shows that the imaging of magnetic implants is possible by using the low field MRI systems, without the use of complicated post processing techniques (e.g., IDEAL).

Magnetic Resonance Imaging of Surgical Implants Made from Weak Magnetic Materials

Institute of Measurement Science, SAS, Dúbravská cesta 9, SK-841 04 Bratislava, Slovakia

Measurement Science Review

Materials with high magnetic susceptibility cause local inhomogeneities in the main field of the magnetic resonance (MR) tomograph. These inhomogeneities lead...

Magnetic Resonance Imaging of Surgical Implants Made from Weak Magnetic Materials

Published Online: Aug 24, 2013

Page range: 165 - 168

DOI: https://doi.org/10.2478/msr-2013-0026

Keywords
NMR imaging, field calculation, metal artifact, surgery implants

This content is open access.

Magnetic Resonance Imaging of Surgical Implants Made from Weak Magnetic Materials

Published Online: Aug 24, 2013

Page range: 165 - 168

DOI: https://doi.org/10.2478/msr-2013-0026

KeywordsNMR imaging, field calculation, metal artifact, surgery implants

This content is open access.

Keywords
NMR imaging, field calculation, metal artifact, surgery implants