Journal of magnetic resonance imaging : JMRI
-
J Magn Reson Imaging · Mar 2010
Case ReportsWhole-body MR imaging for the evaluation of McCune-albright syndrome.
This paper is a detailed case study of a seven-year-old girl who developed precocious puberty. The young girl experienced bilateral breast enlargement, vaginal discharge, and multiple areas of "cafe-au-lait" pigmentation on the skin. The skeletal radiographs showed multiple bone lesions which were suggestive of polyostotic fibrous dysplasia. ⋯ The MRI showed approximately the same number of osseous lesions compared to the skeletal radiographs. In addition, the MRI detected a cystic lesion localized in the pelvis that raised the possibility of an ovarian-follicular cyst. This case suggests that whole-body MRI might be a promising method for the evaluation and follow-up of polyostotic fibrous dysplasia, a disease with diffuse involvement of the musculoskeletal system.
-
J Magn Reson Imaging · Mar 2010
Diagnosis of cirrhosis with intravoxel incoherent motion diffusion MRI and dynamic contrast-enhanced MRI alone and in combination: preliminary experience.
To report our preliminary experience with the use of intravoxel incoherent motion (IVIM) diffusion-weighted magnetic resonance imaging (DW-MRI) and dynamic contrast-enhanced (DCE)-MRI alone and in combination for the diagnosis of liver cirrhosis. ⋯ The combination of DW-MRI and DCE-MRI provides an accurate diagnosis of cirrhosis.
-
J Magn Reson Imaging · Mar 2010
Comparative StudyMachine learning study of several classifiers trained with texture analysis features to differentiate benign from malignant soft-tissue tumors in T1-MRI images.
To study, from a machine learning perspective, the performance of several machine learning classifiers that use texture analysis features extracted from soft-tissue tumors in nonenhanced T1-MRI images to discriminate between malignant and benign tumors. ⋯ Machine learning classifiers trained with texture analysis features are potentially valuable for detecting malignant tumors in T1-MRI images. Analysis of the learning curves of the classifiers showed that a training data size smaller than 100 T1-MRI images is sufficient to train a machine learning classifier that performs as well as expert radiologists.
-
J Magn Reson Imaging · Mar 2010
MRI of the wrist at 7 tesla using an eight-channel array coil combined with parallel imaging: preliminary results.
To determine the feasibility of performing MRI of the wrist at 7 Tesla (T) with parallel imaging and to evaluate how acceleration factors (AF) affect signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and image quality. ⋯ It is feasible to perform high resolution 7T MRI of the wrist with parallel imaging. SNR and CNR decrease with higher AF, but image quality remains above-average.
-
J Magn Reson Imaging · Mar 2010
Comparative StudyComparison of ferucarbotran-enhanced fluid-attenuated inversion-recovery echo-planar, T2-weighted turbo spin-echo, T2*-weighted gradient-echo, and diffusion-weighted echo-planar imaging for detection of malignant liver lesions.
To compare the diagnostic accuracy of superparamagnetic iron oxide (SPIO)-enhanced fluid-attenuated inversion-recovery echo-planar imaging (FLAIR EPI) for malignant liver tumors with that of T2-weighted turbo spin-echo (TSE), T2*-weighted gradient-echo (GRE), and diffusion-weighted echo-planar imaging (DW EPI). ⋯ SPIO-enhanced FLAIR EPI sequence was more accurate in the diagnosis of malignant liver tumors than T2*-weighted GRE and DW EPI sequences. SPIO-enhanced FLAIR EPI sequence is helpful for the detection of malignant liver tumors.