Journal of magnetic resonance imaging : JMRI
-
J Magn Reson Imaging · Mar 2009
Accurate segmentation of subcutaneous and intermuscular adipose tissue from MR images of the thigh.
To describe and evaluate a computer-assisted method for assessing the quantity and distribution of adipose tissue in thigh by magnetic resonance imaging (MRI). ⋯ The proposed approach allowed effective computer-assisted analysis of thigh MR images, dramatically reducing the user work compared to manual analysis. It allowed routine assessment of IMAT, a fat-depot linked with metabolic abnormalities, important in monitoring the effect of nutrition and exercise.
-
J Magn Reson Imaging · Mar 2009
Comparative StudyBiliary anatomy on 3D MRCP: Comparison of volume-rendering and maximum-intensity-projection algorithms.
To compare volume-rendering (VR) and maximum-intensity-projection (MIP) of three-dimensional T2-weighted turbo spin-echo magnetic resonance cholangiopancreatography using a free-breathing navigator-triggered prospective acquisition correction (3D-TSE-PACE-MRCP) to define biliary anatomies. ⋯ VR reformation of 3D-TSE-PACE-MRCP defines biliary anatomies more accurately than MIP.
-
J Magn Reson Imaging · Mar 2009
Comparative StudyDynamic contrast-enhanced magnetic resonance imaging of abdominal solid organ and major vessel: comparison of enhancement effect between Gd-EOB-DTPA and Gd-DTPA.
To evaluate the differences in enhancement of the abdominal solid organ and the major vessel on dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) obtained with gadolinium ethoxybenzyldiethylenetriamine pentaacetic acid (Gd-EOB-DTPA: EOB) and gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA) in the same patients. ⋯ Lower arterial vascular and parenchymal enhancement with Gd-EOB, as compared with Gd-DTPA, may require reassessment of its dose, despite the higher late venous phase liver parenchymal enhancement.
-
J Magn Reson Imaging · Mar 2009
Do respiration and cardiac motion induce magnetic field fluctuations in the breast and are there implications for MR thermometry?
To assess the distribution of respiration and cardiac motion-induced field fluctuations in the breast and to evaluate the implications of such fluctuations for proton resonance frequency shift (PRFS) MR thermometry in the breast. ⋯ Respiration causes significant field fluctuations in the breast. If MR thermometry were to be safely used in clinical practice, these fluctuations should be taken into account and should probably be corrected for.
-
J Magn Reson Imaging · Mar 2009
Comparative StudyEffect of superparamagnetic iron oxide on tumor-to-liver contrast at T2*-weighted gradient-echo MRI: comparison between 3.0T and 1.5T MR systems.
To compare 3.0T and 1.5T MR systems in terms of the effect of superparamagnetic iron oxide (SPIO) on tumor-to-liver contrast in T2*-weighted gradient-echo MRI. ⋯ Our results showed that the effect of SPIO on tumor-to-liver contrast at T2*-weighted gradient-echo imaging was similar for the 1.5T and 3.0T systems, and that the 8.4-msec TE was optimal of the four TEs used in this study at 3.0T.