Junko Takaba

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PURPOSE To determine if apparent diffusion coefficient (ADC) can be used to differentiate brain tumors at magnetic resonance (MR) imaging. MATERIALS AND METHODS Institutional review board approval or informed patient consent was not required. MR images were reviewed retrospectively in 275 patients with brain tumors: 147 males and 128 females 1-81 years(More)
BACKGROUND AND PURPOSE Quantification of MR can provide objective, accurate criteria for evaluation of a given MR sequence. We quantitatively compared conventional MR sequences with fast fluid-attenuated inversion recovery (fast-FLAIR) and echo-planar diffusion-weighted (DW) MR imaging in the examination of intracranial epidermoid tumors. METHODS Eight(More)
In many cases of myotonic dystrophy, high-intensity areas are seen in the cerebral white matter on T2-weighted imaging. Brain MRI was performed in 15 patients with myotonic dystrophy using diffusion tensor imaging, which is sensitive to the detailed structure of white matter, and the results were compared with those of normal controls. FA (anisotropic(More)
It has been reported that contrast-enhanced fluid-attenuated inversion-recovery (FLAIR) sequences were useful for detecting superficial abnormalities, such as meningeal disease, because they do not demonstrate contrast enhancement of cortical vessels with slow flow as do T1-weighted images. We reported the usefulness of contrast-enhanced FLAIR images to(More)
PURPOSE To determine whether myotonic dystrophy (MyD) patients have diffusion tensor abnormalities suggestive of microstructural changes in normal-appearing white matter (NAWM). MATERIAL AND METHODS Conventional and diffusion tensor magnetic resonance images of the brain were obtained in 19 MyD patients and 19 age-matched normal control subjects.(More)
PURPOSE To retrospectively evaluate whether the mean, minimum, and maximum apparent diffusion coefficient (ADC) of glioblastomas obtained from pretreatment MR images is of prognostic value in patients with glioblastoma. MATERIALS AND METHODS The institutional review board approved our study and waived the requirement for informed patient consent. Between(More)
The signals of lactate and lipids partially overlap in single-voxel proton MR spectroscopy (1HMRS), sometimes making them difficult to differentiate in clinical settings. Our aim in this study was to identify lactate and lipids by varying the echo time (TE). We expect that the accurate detection of lactate and lipids will have high diagnostic value in the(More)
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