The anomalous line broadening behaviour exhibited by Li1.2Mn0.4Ni0.3Co0.1O2 during charging to high voltage (> 4.4V) has been investigated. Previous hypotheses attributing the phenomena to stacking faults can not explain all of the broadening features, as some of them (e.g. 003) disobey the selection rules expected of stacking faults in a cubic close-packed system (H-K = 3N ± 1). An alternative...

An atmospheric correction algorithm is proposed for the reconstruction of ground surface reflectance from data satellite measurements. A distinctive feature that it takes into account influence inhomogeneity on adjacency effect and additional illumination by reflected radiation. These factors are important fragments with sharp changes high turbidity. The based Monte Carlo programs developed aut...

introduction polymer gel dosimeters offer a practical solution to 3d dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. in this study, egsnrc calculated and pagat polymer gel dosimeter measured dose profiles from single shot irradiation with 18 mm collimator of gamma knife in homogeneous and inhomogeneous phantoms were compared with eac...

Purpose: To evaluate a template-based approach to correct B1 field inhomogeneity in brain MRI using B1 maps from other subjects to reduce the acquisition time. Introduction: Accurate estimation of T1 maps is increasingly important for some clinical applications. Low noise, high resolution, fast and accurate T1 maps from MRI images of the brain can be performed using a dual flip angle method [1]...

This work presents a new algorithm (nonuniform intensity correction; NIC) for correction of intensity inhomogeneities in T1-weighted magnetic resonance (MR) images. The bias field and a bias-free image are obtained through an iterative process that uses brain tissue segmentation. The algorithm was validated by means of realistic phantom images and a set of 24 real images. The first evaluation p...

As the number of applications directed towards group collaboration and group media dissemination increases, the interest for multicast protocols has also grown during recent years. Several applications have a need for reliability. This is true for the use of shared network editors, shared white-boards, networked games, etc. An increased popularity of media and application distribution over the ...

D. Yeo, J. A. Fessler, B. Kim Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, United States, Radiology, University of Michigan Medical School, Ann Arbor, MI, United States Introduction: The accuracy of measuring voxel intensity changes between stimulus and rest images in fMRI echo-planar imaging (EPI) data, from which brain activation maps are computed, is se...