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research article

Magnetization transfer-based 3D visualization of foot peripheral nerves

Mekle, Ralf  
•
Mortamet, Benedicte  
•
Granziera, Cristina
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2013
Journal of magnetic resonance imaging : JMRI

PURPOSE: To investigate magnetization transfer (MT) effects as a new source of contrast for imaging and tracking of peripheral foot nerves. MATERIALS AND METHODS: Two sets of 3D spoiled gradient-echo images acquired with and without a saturation pulse were used to generate MT ratio (MTR) maps of 260 μm in-plane resolution for eight volunteers at 3T. Scan parameters were adjusted to minimize signal loss due to T2 dephasing, and a dedicated coil was used to improve the inherently low signal-to-noise ratio of small voxels. Resulting MTR values in foot nerves were compared with those in surrounding muscle tissue. RESULTS: Average MTR values for muscle (45.5 ± 1.4%) and nerve (21.4 ± 3.1%) were significantly different (P < 0.0001). In general, the difference in MTR values was sufficiently large to allow for intensity-based segmentation and tracking of foot nerves in individual subjects. This procedure was termed MT-based 3D visualization. CONCLUSION: The MTR serves as a new source of contrast for imaging of peripheral foot nerves and provides a means for high spatial resolution tracking of these structures. The proposed methodology is directly applicable on standard clinical MR scanners and could be applied to systemic pathologies, such as diabetes. J. Magn. Reson. Imaging 2012. © 2012 Wiley Periodicals, Inc.

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Type
research article
DOI
10.1002/jmri.23828
Web of Science ID

WOS:000318049200028

Author(s)
Mekle, Ralf  
Mortamet, Benedicte  
Granziera, Cristina
Krueger, Gunnar  
Chevrey, Nicolas
Theumann, Nicolas
Gambarota, Guilio
Date Issued

2013

Publisher

Wiley-Blackwell

Published in
Journal of magnetic resonance imaging : JMRI
Volume

37

Start page

1234

End page

1237

Subjects

CIBM-AIT

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIFMET  
CIBM  
Available on Infoscience
March 17, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/90430
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