Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Apr 2009
Assessment of iron distribution between liver, spleen, pancreas, bone marrow, and myocardium by means of R2 relaxometry with MRI in patients with beta-thalassemia major.
To investigate the correlation between the degree of hepatic, splenic, pancreatic, vertebral bone marrow (VBM), and myocardial siderosis, as expressed by relaxation rate (R2 = 1/T2) values, in patients with thalassemia. ⋯ Despite positive correlations between the degree of hepatic, splenic, and VBM siderosis, as expressed by respective R2 values, there was variability of iron distribution patterns in thalassemic patients. Unpredictable patterns of iron distribution may be seen, such as normal signal of the spleen in the presence of siderotic liver, resembling primary hemochromatosis. Fatty degeneration of the pancreas was not uncommon.
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J Magn Reson Imaging · Apr 2009
Characterization of chondroblastic osteosarcoma: gadolinium-enhanced versus diffusion-weighted MR imaging.
To detect differences in magnetic resonance imaging (MRI) between chondroblastic osteosarcoma and the other types of osteosarcomas or chondrosarcomas using gadolinium-enhanced versus diffusion-weighted sequences. ⋯ DWI appears to be more useful for differentiating between chondroblastic osteosarcoma and chondrosarcoma or other types of osteosarcoma than Gd-enhanced MRI.
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J Magn Reson Imaging · Apr 2009
High-resolution fMRI with higher-order generalized series imaging and parallel imaging techniques (HGS-parallel).
To develop a novel approach for high-resolution functional MRI (fMRI) using the conventional gradient-echo sequence. ⋯ This study suggests that the proposed method can be used for high-resolution fMRI studies without the geometric distortion and the Nyquist ghost artifacts compared to EPI.
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J Magn Reson Imaging · Apr 2009
High-resolution diffusion tensor imaging with inner field-of-view EPI.
To demonstrate the applicability of inner field-of-view (FOV) echo-planar imaging based on spatially two-dimensional selective radiofrequency excitations to high-resolution diffusion tensor imaging. ⋯ Inner FOV echo-planar imaging may help to improve the spatial resolution and thus the accuracy of diffusion anisotropy and white matter fiber orientation measurements in the human central nervous system.