Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Mar 2005
Comparative StudyWater-saturated three-dimensional balanced steady-state free precession for fast abdominal fat quantification.
To compare the performance of a novel water-saturated b-SSFP sequence with that of a conventional T1-weighted turbo spin echo (T1W TSE) sequence for abdominal fat quantification. ⋯ The proposed three-dimensional water-saturated b-SSFP sequence can generate high quality fat-only abdominal images with high CNR and SNR in shorter scan duration than the conventional T1W TSE approach. As images generated by this sequence suffer from no flow artifacts, and are less sensitive to bulk, respiratory, and bowel motion, three-dimensional water-saturated b-SSFP is a faster and more robust method for improving abdominal fat quantification using MRI.
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J Magn Reson Imaging · Mar 2005
Comparative StudyComparison between three-dimensional volume-selective turbo spin-echo imaging and two-dimensional ultrasound for assessing carotid artery structure and function.
To compare a volume-selective three-dimensional turbo spin echo (TSE) technique with ultrasound (US) for assessing carotid artery wall structure and function. ⋯ There was a good agreement between MRI and the clinically established two-dimensional US method. The MRI method has the advantage of providing increased vessel coverage, which permits one to assess localized abnormalities without assuming vessel uniformity.
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J Magn Reson Imaging · Mar 2005
Measurement of cervical spinal cord cross-sectional area by MRI using edge detection and partial volume correction.
To detail a procedure to accurately measure upper cervical cord cross-sectional area (CSA), using MRI, by correcting for partial volume averaging (PVA), and to assess the usefulness of the procedure for measuring cervical cord atrophy rates in longitudinal studies. ⋯ Correcting for PVA allows accurate measurement of the upper cervical cord CSA and accurate measurement of a standard phantom to guard against scanner drift in longitudinal studies of cord CSA.
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J Magn Reson Imaging · Mar 2005
Comparative StudyMultislice MR first-pass myocardial perfusion imaging: impact of the receiver coil array.
To compare a new 12-element body phased-array coil with a conventional four-element surface receiver coil array to provide increased signal-to-noise ratios (SNRs) for cardiac steady state free precession (SSFP) perfusion imaging. ⋯ The 12-element coil array provides higher SNR, but these improvements come with trade-offs in image homogeneity. Increased SNR translates into higher semiquantitative perfusion values and offers the potential for improved detection of perfusion defects.
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J Magn Reson Imaging · Mar 2005
An automated algorithm for combining multivoxel MRS data acquired with phased-array coils.
To develop a fully automated algorithm for combining multivoxel magnetic resonance spectroscopy (MRS) data acquired with a phased-array coil. ⋯ The method described in this report provides a means for employing phased-array coils in MRS with the same advantages as those found in MRI.