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Myelin water imaging: Implementation and development at 3.0T and comparison to 1.5T measurements
Magnetic resonance in medicine, 2009-07, Vol.62 (1), p.106-115
Kolind, Shannon H.
Mädler, Burkhard
Fischer, Stefan
Li, David K.B.
MacKay, Alex L.
2009
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Kolind, Shannon H.
Mädler, Burkhard
Fischer, Stefan
Li, David K.B.
MacKay, Alex L.
Titel
Myelin water imaging: Implementation and development at 3.0T and comparison to 1.5T measurements
Ist Teil von
Magnetic resonance in medicine, 2009-07, Vol.62 (1), p.106-115
Ort / Verlag
Hoboken: Wiley Subscription Services, Inc., A Wiley Company
Erscheinungsjahr
2009
Quelle
MEDLINE
Beschreibungen/Notizen
Multicomponent T2 relaxation imaging can be used to measure signal from water trapped between myelin bilayers; the ratio of myelin water signal to total water is termed the myelin water fraction (MWF). The goal of this study was to implement and develop the single‐slice T2‐imaging technique proposed by Poon and Henkelman. For refinement, scan parameters (gradient crusher height and slew rate, bandwidth, echo spacing, matrix size, repetition time, and phase rewinding) were varied in water‐based phantoms and in fixed and in vivo brain. Changes in the standard deviation of the residuals of the multiexponential fit, MWF, T2, and peak width of the intra/extracellular water were monitored to determine which scan parameters minimized artifacts. Subsequently, we compared multicomponent T2 measurements at 1.5T and 3.0T for 10 healthy volunteers, and investigated the differences in SNR, fit residuals, MWF, and T2 and peak width of the intra/extracellular water, at higher magnetic field. MWF maps were found to be qualitatively similar between field strengths. MWFs were found to be significantly higher at 3.0T than at 1.5T, but with a strongly significant correlation between measurements (R2 > 0.92, P < 0.0005). The signal‐to‐noise ratio (SNR) was nearly double at 3.0T, but the standard deviation of residuals was increased in most cases. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0740-3194, 1522-2594
eISSN: 1522-2594
DOI: 10.1002/mrm.21966
Titel-ID: cdi_proquest_miscellaneous_883019843
Format
–
Schlagworte
Algorithms
,
Brain
,
Brain Chemistry
,
Development
,
Humans
,
Image Enhancement - methods
,
Image Interpretation, Computer-Assisted - methods
,
imaging
,
Magnetic fields
,
Magnetic Resonance Imaging - instrumentation
,
Magnetic Resonance Imaging - methods
,
Multiple Sclerosis - metabolism
,
Multiple Sclerosis - pathology
,
Myelin
,
Myelin Sheath - chemistry
,
myelin water fraction
,
N.M.R
,
Nerve Fibers, Myelinated - chemistry
,
Neuroimaging
,
Phantoms, Imaging
,
Repetition
,
Reproducibility of Results
,
Sensitivity and Specificity
,
Signal Processing, Computer-Assisted
,
Standard deviation
,
water
,
Water - analysis
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