Journal of magnetic resonance imaging : JMRI
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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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J Magn Reson Imaging · Jul 2015
Diffusion-weighted imaging of prostate cancer using a statistical model based on the gamma distribution.
To assess the adequacy of a statistical model based on the gamma distribution for diffusion signal decays of prostate cancer (PCa) using b-values ranging up to 2000 sec/mm(2) , and to evaluate the differences in gamma model parameters for PCa, benign prostatic hyperplasia (BPH), and peripheral zone (PZ). ⋯ A statistical model based on the gamma distribution proved suitable for describing diffusion signal decay curves of PCa. This approach may provide better correlation between diffusion signal decay and histological information in the prostate gland.
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J Magn Reson Imaging · Jun 2015
Comparative StudyEvaluation of staging and early response to chemotherapy with whole-body diffusion-weighted MRI in malignant lymphoma patients: A comparison with FDG-PET/CT.
To examine the utility of diffusion-weighted MRI (DW-MRI) for staging and early response to chemotherapy assessment in lymphoma patients as compared with fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT). ⋯ DW-MRI is a promising tool for staging and evaluation of early response to chemotherapy in patients with lymphoma.
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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.