Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Apr 2010
Fast three-dimensional dual echo dixon technique improves fat suppression in breast MRI.
To compare qualitative and quantitative measures of the contrast-enhanced dual-echo Dixon technique with the commonly used standard three-dimensional (3D) gradient echo (spectrally selective fat suppression) technique (SS-FS) in breast MRI exams (bMRI). ⋯ Dixon images were superior to the standard SS-SF images in both qualitative and quantitative assessment of 19 bMRI exams. The Dixon technique could replace standard SS-SF technique in bMRI exam, after our findings have been confirmed in future studies with a larger sample size.
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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.
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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.
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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.
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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.