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Reduced field-of-vi...
Reduced field-of-view MRI using outer volume suppression for spinal cord diffusion imaging
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Wilm, B. J. (författare)
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- Svensson, Jonas (författare)
- Lund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups
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Henning, A. (författare)
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Pruessmann, K. P. (författare)
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Boesiger, P. (författare)
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Kollias, S. S. (författare)
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(creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Magnetic Resonance in Medicine. - : Wiley. - 1522-2594 .- 0740-3194. ; 57:3, s. 625-630
- Relaterad länk:
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http://dx.doi.org/10...
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https://onlinelibrar...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A spin-echo single-shot echo-planar imaging (SS-EPI) technique with a reduced field of view (FOV) in the phase-encoding direction is presented that simultaneously reduces susceptibility effects and motion artifacts in diffusion-weighted (DW) imaging (DWI) of the spinal cord at a high field strength (3T). To minimize aliasing, an outer volume suppression (OVS) sequence was implemented. Effective fat suppression was achieved with the use of a slice-selection gradient-reversal technique. The OVS was optimized by numerical simulations with respect to T-1 relaxation times and B-1 variations. The optimized sequence was evaluated in vitro and in vivo. In simulations the optimized OVS showed suppression to < 0.25% and similar to 3% in an optimal and worst-case scenario, respectively. In vitro measurements showed a mean residual signal of < 0.95% +/- 0.42 for all suppressed areas. In vivo acquisition with 0.9 x 1.05 mm(2) in-plane resolution resulted in artifact-free images. The short imaging time of this technique makes it promising for clinical studies.
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
- outer volume suppression
- reduced FOV
- spinal cord
- diffusion imaging
- DTI
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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