Influence Exerted by MPG-directions on Diffusion Tensor Imaging(DTI)
نویسندگان
چکیده
منابع مشابه
[Influence exerted by MPG-directions on diffusion tensor imaging (DTI)].
When diffusion tensor was analyzed, increasing motion probing gradient (MPG) directions and increasing signal-to-noise ratio (SNR) as result might influence diffusion tensor calculation. This study determined that mean diffusivity (MD) and fractional anisotropy (FA) are calculated by changing MPG-directions or SNR in the volunteer. There were no statistically significant differences in MD, whic...
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OBJECTIVES The purpose of this study was to evaluate to which degree investment of acquisition time in more encoding directions leads to better image quality (IQ) and what influence the number of encoding directions and the choice of b-values have on renal diffusion tensor imaging (DTI) parameters. MATERIAL AND METHODS Eight healthy volunteers (32.3 y ± 5.1 y) consented to an examination in a...
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BACKGROUND AND PURPOSE The effects of a number of diffusion-encoding gradient directions (NDGD) on diffusion tensor imaging (DTI) indices have been studied previously with theoretic analysis and numeric simulations. In this study, we made in vivo measurements in the human brain to compare different clinical scan protocols and to evaluate their effects on the calculated DTI indices. METHODS Fi...
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Diffusion tensor reconstruction is made possible through the acquisition of several diffusion weighted images, each corresponding to a given sampling direction in the q-space. In this study, we address the question of sampling efficiency, and show that in case we have some prior knowledge on the diffusion characteristics, we may be able to adapt the sampling directions for better reconstruction...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 2009
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.65.913