Journal of magnetic resonance imaging : JMRI
-
J Magn Reson Imaging · Jul 2007
T2 mapping of hip articular cartilage in healthy volunteers at 3T: a study of topographic variation.
To perform baseline T2 mapping of the hips of healthy volunteers, focusing on topographic variation, because no detailed study has involved hips. T2 mapping is a quantitative magnetic resonance imaging (MRI) technique that evaluates cartilage matrix components. ⋯ Topographic variation exists in hip cartilage T2 in young, healthy adults. These findings should be taken into account when T2 mapping is applied to patients with degenerative cartilage.
-
J Magn Reson Imaging · Jul 2007
Dynamic contrast-enhanced magnetic resonance imaging of human melanoma xenografts with necrotic regions.
To investigate whether high-resolution images of necrotic regions in tumors can be derived from gadopentetate dimeglumine (Gd-DTPA)-based dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) series. ⋯ Clinically relevant images of necrotic tumor regions can be obtained for E-13 melanomas by subjecting Gd-DTPA-based DCE-MRI series to Kety analysis.
-
J Magn Reson Imaging · Jul 2007
3D 1H MRSI of brain tumors at 3.0 Tesla using an eight-channel phased-array head coil.
To implement proton magnetic resonance spectroscopic imaging (1H MRSI) at 3 Tesla (3T) using an eight-channel phased-array head coil in a population of brain-tumor patients. ⋯ The realized increase in SNR means that clinically relevant data can be obtained in five to 10 minutes at 3T and used to predict the spatial extent of tumor in a manner similar to that previously used to acquire 1.5T data in 17 minutes.
-
J Magn Reson Imaging · Jul 2007
Upper cervical spinal cord cross-sectional area in relapsing remitting multiple sclerosis: application of a new technique for measuring cross-sectional area on magnetic resonance images.
To measure accurately the upper cervical cord cross-sectional area (CSA) in patients with relapsing remitting multiple sclerosis (RRMS), and normal control subjects, to address the paradox that longitudinal reduction in CSA has been detected in RRMS while reduction compared to controls has not. We hypothesized that a lack of statistical power and/or measurement sensitivity due to partial volume averaging in previous studies contributed to this paradox. ⋯ Using a sensitive analysis method, and apparently appropriate statistical power, we did not detect reduced CSA in RRMS patients. We hypothesize that this may be due to inflammation.
-
J Magn Reson Imaging · Jul 2007
Role of MRI in investigating the effects of elastic compression stockings on the deformation of the superficial and deep veins in the lower leg.
To evaluate the potential of MRI to investigate the mechanical effects of compression stockings on the veins of the lower limb. ⋯ MRI offers a precise source of data on the mechanical effects of lower-limb compression. Ultrasound (US) may be more cost-effective, but the data acquired are less comprehensive. Future biomechanical studies of lower-limb compression should make use of MRI.