نتایج جستجو برای: relaxometry

تعداد نتایج: 838  

Journal: :Biomedical Engineering / Biomedizinische Technik 2015

2014
L. FANEA S. NICOARA S. V. BODEA S. A. SFRANGEU

Two quantitative ocular magnetic resonance imaging (MRI) methods for the clinical use in Ophthalmology and Radiology were developed. Ocular MRI images with spatio-temporal resoultions of 0.78/1.56/2/(5 to 84) mm/mm/mm/s were acquired from patients with diabetic retinopathy and normal subjects using a 1 T MRI system. T1 and T2 MRI relaxometry maps were generated offline from the MRI images acqui...

2014
Huabing Liu Marcel N d’Eurydice Sergei Obruchkov Petrik Galvosas

Pore length scales and pore surface relaxivities of sandstone were studied on a 2 MHz Rock Core Analyzer in this work. To determine the pore length scales of rock cores, high eigenmodes of diffusion equation were detected with optimized encoding periods in the presence of internal magnetic fields Bin. The results were confirmed by a 64 MHz NMR system. Furthermore, this methodology was combined ...

2009
Santhosh Ayalur-Karunakaran Siegfried Stapf

Poly (Dimethyl siloxane) thin films were prepared by solvent evaporation method in porous alumina hosts. The thickness of these layers ranged from multilayer to sub-monolayer. Different NMR methods (FFC relaxometry, transverse relaxation, H Double quantum NMR) were applied to study the dynamics and order in these thin films. We found that dynamic restrictions and order increased with decreasing...

2007
J. F. Jansen E. P. Lemmens G. Hoogland O. E. Schijns W. Jennekens G. J. Strijkers J. J. Prompers J. W. Habets M. E. Kooi W. H. Backes K. Nicolay

regions of interests. (B,C,D) Bar diagrams displaying the mean±SD T2, trace and FA values, respectively, for the HT(blue), HT+ (red), and NT (green) rat pups, at PN10 (solid) and PN66 (dashed). * and ** denote p<0.05 and p<0.01, respectively. (E,F) ADC images at PN66 of a typical NT rat (E) and a HT+ rat (F). Notice the pronounced ventral signal decrease in the HT+ rat. Prospective brain T2 rel...

2008
B-Y. Lee D. Bigler J. R. Connor Q. X. Yang

Introduction: Restless leg syndrome (RLS) is a sensory-motor disorder causing chronic sleep disturbances. Currently, neuroradiological investigations such as functional MRI, voxel-based relaxometry (VBR) as well as nuclear medicine have revealed a widespread pattern of pathological changes involving cerebra, cerebella and brain stem [1-3]. Thus, underlying mechanism of RLS is not well-understoo...

2014
Ben Andrew Duffy ManKin Choy

................................................................................................................... 3 Acknowledgements .................................................................................................. 4 List of Figures ........................................................................................................ 10 List of Tables .........................

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