Journal of magnetic resonance imaging : JMRI
-
J Magn Reson Imaging · Dec 2004
Comparative StudyComparative study of FAST gradient echo MRI sequences: phantom study.
To investigate a balanced steady state free precession sequence (b-SSFP) under a large range of conditions and to compare its performance with other types of gradient echo sequences for dynamic imaging. ⋯ The CDR of b-TFE was much narrower than that of T1-TFE but could be widened under optimized conditions. The sensitivity of the b-TFE technique was the highest of the three sequences under all conditions tested.
-
J Magn Reson Imaging · Dec 2004
Comparative StudyT2-weighted spine imaging with a fast three-point dixon technique: comparison with chemical shift selective fat suppression.
To develop a phased-array coil-compatible, fast three-point Dixon (TPD) technique, and compare its performance in T2-weighted spine imaging with that of the standard chemical shift selective (CHESS) fat suppression technique. ⋯ The fast TPD technique provides superior fat suppression and lesion conspicuity, and potentially can be used as an alternative to T2-weighted imaging of the spine.
-
J Magn Reson Imaging · Dec 2004
Quantitative cerebral perfusion using the PRESTO acquisition scheme.
To evaluate the feasibility of using the rapid principles of echo shifting with a train of observations (PRESTO) sequence for measurements of cerebral hemodynamic parameters based on first pass of a contrast agent. ⋯ The study showed that PRESTO and EPI led to comparable quantitative perfusion parameters.
-
J Magn Reson Imaging · Dec 2004
Neurochemistry of late-life major depression: a pilot two-dimensional MR spectroscopic study.
To evaluate a two-dimensional localized chemical shift correlated spectroscopy (L-COSY) sequence in elderly patients with major depression. ⋯ Our pilot study shows the feasibility of performing two-dimensional L-COSY successfully in elderly subjects and patients with late-life mood disorders. These findings are consistent with and expand on our earlier findings in major depressive disorder (MDD) detected with one-dimensional MRS.