Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Feb 2014
Comparative StudyIntra- and interscanner reliability and reproducibility of 3D whole-brain pseudo-continuous arterial spin-labeling MR perfusion at 3T.
To assess the reliability and reproducibility of pseudo-continuous arterial spin labeling (pCASL). Intra- and interscanner reliability and reproducibility are essential before pooling perfusion imaging data. ⋯ Although excellent intra- and interscanner reliability and reproducibility could support the feasibility of cross-site pooling of ASL data, pCASL with multiple PLDs may better assess the CBF of the human brain.
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J Magn Reson Imaging · Feb 2014
Randomized Controlled Trial Comparative StudyComparison of three-dimensional pseudo-continuous arterial spin labeling perfusion imaging with gradient-echo and spin-echo dynamic susceptibility contrast MRI.
To compare the relative cerebral blood flow (CBF) obtained by pseudo-continuous arterial spin labeling sequence incorporated with volumetric fast spin-echo readout (3D-PCASL) with those by gradient-echo (GE) and spin-echo (SE) dynamic susceptibility contrast (DSC) MRI. ⋯ This study suggested that perfusion images obtained from 3D-PCASL exhibited significant correlations with DSC-MRI, with greater microvascular weighting like SE-DSC.
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J Magn Reson Imaging · Feb 2014
Effects of receive-only inserts on specific absorption rate, B1 (+) field, and Tx coil performance.
To evaluate the effect of different cylindrical and close-conforming receive-only array designs on spin excitation and specific absorption rate (SAR) of a 7 T transmit-only head coil. ⋯ Changes in local/global SAR and subtle changes in B1 (+) field distributions were observed in the presence of Rx-only inserts. Thus, incorporation of the receive-only array effects are needed when evaluating SAR and designing RF transmit pulse waveform parameters for shimming and/or Tx-SENSE for 7 T MRI.
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J Magn Reson Imaging · Feb 2014
Whole-body MR angiography: first experiences with the new TimCT technology with single contrast injection.
To assess image quality, presence of artifacts, arterial stenosis, and interobserver agreement of Tim-CT in assessment of the arterial system using contrast-enhanced whole-body-MRA (CE-Wb-MRA) with a single contrast-medium injection in patients with arteriosclerosis. ⋯ CE-Wb-MRA using the TimCT technology and with a single contrast injection is a feasible tool for whole-body MRA.