Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · May 2013
Software for automated MRI-based quantification of abdominal fat and preliminary evaluation in morbidly obese patients.
To present software for supervised automatic quantification of visceral and subcutaneous adipose tissue (VAT, SAT) and evaluates its performance in terms of reliability, interobserver variation, and processing time, since fully automatic segmentation of fat-fraction magnetic resonance imaging (MRI) is fast but susceptible to anatomical variations and artifacts, particularly for advanced stages of obesity. ⋯ The presented supervised automatic approach provides a reliable option for MRI-based fat quantification in morbidly obese patients and was much faster than manual analysis.
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J Magn Reson Imaging · May 2013
Usefulness of Gd-EOB-DTPA-enhanced MR imaging in the evaluation of simple steatosis and nonalcoholic steatohepatitis.
To evaluate the usefulness of gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd-EOB-DTPA)-enhanced MR imaging (EOB-MRI) in differentiating between simple steatosis and nonalcoholic steatohepatitis (NASH), as compared with MR in-phase/out-of-phase imaging. The correlations between the MR features and histological characteristics were preliminarily investigated. ⋯ In simple steatosis and NASH, the hepatobiliary-phase enhancement ratio of EOB-MRI showed significant association with fibrosis stage, and may be a useful discriminating parameter compared with the fat fraction measured by in-phase/out-of-phase imaging.
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The spin echo sequence is a fundamental pulse sequence in MRI. Many of today's applications in routine clinical use are based on this elementary sequence. ⋯ Important properties such as the behavior in multi-slice imaging or in the presence of flow are depicted and the basic differences with gradient echo imaging are illustrated. The characteristics of the spin echo sequence for different magnetic field strengths with respect to clinical applications are discussed.
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J Magn Reson Imaging · Apr 2013
Arterial enhancing-only nodules less than 2 cm in diameter in patients with liver cirrhosis: predictors of hepatocellular carcinoma diagnosis on gadobenate dimeglumine-enhanced MR imaging.
To assess whether gadobenate dimeglumine (Gd-BOPTA)-enhanced MR imaging could predict hepatocellular carcinoma (HCC) diagnosis in small arterial enhancing-only nodules detected by contrast-enhanced computed tomography (CT) in patients with liver cirrhosis. ⋯ Gd-BOPTA-enhanced MR imaging provides imaging findings which may predict a diagnosis of HCC in small arterial enhancing-only nodules in cirrhotic patients.
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J Magn Reson Imaging · Apr 2013
Automated unsupervised multi-parametric classification of adipose tissue depots in skeletal muscle.
To introduce and validate an automated unsupervised multi-parametric method for segmentation of the subcutaneous fat and muscle regions to determine subcutaneous adipose tissue (SAT) and intermuscular adipose tissue (IMAT) areas based on data from a quantitative chemical shift-based water-fat separation approach. ⋯ The proposed multi-parametric segmentation approach combined with quantitative water-fat imaging provides an accurate and reliable method for an automated calculation of the SAT and IMAT areas reducing considerably the total postprocessing time.