منابع مشابه
Computing diffusion rates in T2-dark hematomas and areas of low T2 signal.
BACKGROUND AND PURPOSE It has been suggested that restricted diffusion is present within hematomas with intact red cell membranes; however, computing apparent diffusion coefficient (ADC) values in areas of low T2 signal can be problematic. Our purpose was to show the pitfalls of measuring diffusion within hematomas with intracellular blood products and to present a framework based on the proper...
متن کاملInvestigating effects from restricted diffusion in multi-component diffusion data
We have investigated model systems in which effects from non-Gaussian restricted diffusion could be separated from effects caused by multiple diffusion coefficients. We applied various models to analyze the experimental data. An analysis based on multiexponential models does not account correctly for effects caused by restricted diffusion in a system with multiple compartments. However, separat...
متن کاملdiffusion weighted imaging, diffusion tensor imaging, and t2* mapping of lumbar intervertebral disc in young healthy adults
conclusion adc, fa, and t2* values may quantitatively reflect the microstructural characteristics of np, therefore they could be used to detect the minimal changes of early ldd. results the adc, fa, and t2* values were different (p < 0.05) among different rois within the same disc or among corresponding rois in different level discs. while the average values of adc increased regularly with the ...
متن کاملDiffusion-Weighted, Readout-Segmented EPI with Synthesized T2- and T2*-Weighted Images
Purpose: Diffusion-weighted Imaging (DWI) using readout-segmented EPI (rs-EPI) with 2D navigator correction [1] is an alternative to standard single-shot EPI (ss-EPI) that improves image quality by reducing susceptibility artifacts and allowing a higher spatial resolution. This improved image quality raises the possibility that the low b-value image could be used to replace a separate T2-weight...
متن کاملSpontaneous intracerebral hematoma on diffusion-weighted images: influence of T2-shine-through and T2-blackout effects.
BACKGROUND AND PURPOSE On diffusion-weighted (DW) images, primary hematomas are initially mainly hyperintense, and then hypointense during the first few days after stroke onset. As in other brain disorders, variations in the T2 relaxation time of the hematoma influence the DW imaging signal intensity. Our aim was to evaluate the contribution of the T2 signal intensity and apparent diffusion coe...
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ژورنال
عنوان ژورنال: Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques
سال: 2012
ISSN: 0317-1671,2057-0155
DOI: 10.1017/s0317167100015456