Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Jul 2015
Comparative StudyMRI-based staging of hepatic fibrosis: Comparison of intravoxel incoherent motion diffusion-weighted imaging with magnetic resonance elastography.
To evaluate the use of intravoxel incoherent motion (IVIM) imaging for staging hepatic fibrosis, and compare its staging ability with that of magnetic resonance elastography (MRE). ⋯ IVIM imaging is a useful technique for evaluating hepatic fibrosis, but MRE is better able to discriminate fibrosis stages than IVIM imaging.
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J Magn Reson Imaging · Jul 2015
Use of a high b-value for diffusion weighted imaging of peritumoral regions to differentiate high-grade gliomas and solitary metastases.
To determine whether apparent diffusion coefficient (ADC) values obtained using a b-value of 3000 s/mm(2) can be used to differentiate high-grade glioma (HGG) from solitary metastases (SM). ⋯ ADC values from DWI using a high b-value were found to distinguish HGG and SM. The lowest degree of overlap was obtained when an ADCMIN value was obtained at a b-value of 3000 s/mm(2) .
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J Magn Reson Imaging · Jul 2015
T2 Relaxation time quantitation differs between pulse sequences in articular cartilage.
To compare T2 relaxation time measurements between MR pulse sequences at 3 Tesla in agar phantoms and in vivo patellar, femoral, and tibial articular cartilage. ⋯ 2D-FSE, qDESS, and 3D-MAPSS demonstrated the best fits with SE measurements as well as the greatest dynamic ranges. The 3D-MAPSS, 3D vfl-FSE, and qDESS demonstrated the closest average measurements to SE. Discrepancies in T2 relaxation time quantitation between sequences suggest that care should be taken when comparing results between studies.
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To present and validate a manifold learning (ML)-based method that can estimate both cardiac and respiratory navigator signals from electrocardiogram (ECG)-free free-breathing cardiac magnetic resonance imaging (MRI) data to achieve self-gated retrospective CINE reconstruction. ⋯ Accurate respiratory and cardiac navigator signals can be estimated using the proposed framework from the acquired data itself, resulting in retrospective self-gated CINE reconstruction with high spatial and temporal quality.
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J Magn Reson Imaging · Jun 2015
Prediction of survival for patients with advanced colorectal cancer using (1) H High-resolution magic angle spinning nuclear MR spectroscopy.
To evaluate whether the metabolic profiles of colorectal cancer specimens can be used for prediction of survival. ⋯ Our results indicate that HR MAS spectroscopy is potentially useful for survival prediction in advanced colorectal cancer.