Angular resolution expected from iCHORD orientation maps through a revisited ion channeling model
نویسندگان
چکیده
منابع مشابه
Channeling in helium ion microscopy: Mapping of crystal orientation
BACKGROUND The unique surface sensitivity and the high resolution that can be achieved with helium ion microscopy make it a competitive technique for modern materials characterization. As in other techniques that make use of a charged particle beam, channeling through the crystal structure of the bulk of the material can occur. RESULTS Here, we demonstrate how this bulk phenomenon affects sec...
متن کاملReliably Estimating the Diffusion Orientation Distribution Function from High Angular Resolution Diffusion Imaging Data
This paper describes an automated model selection method for analysing the relationship between the order of the spherical harmonic basis functions used to fit high angular resolution diffusion imaging (HARDI) data and the accuracy of the fitting results. The method performs statistical inference on the spherical harmonic expansion coefficients and uses a backward elimination procedure to remov...
متن کاملFibertract segmentation in position orientation space from high angular resolution diffusion MRI.
In diffusion MRI, standard approaches for fibertract identification are based on algorithms that generate lines of coherent diffusion, currently known as tractography. A tract is then identified as a set of such lines selected on some criteria. In the present study, we investigate whether fibertract identification can be formulated as a segmentation task that recognizes a fibertract as a region...
متن کاملTissue structure complexity maps from high angular resolution diffusion weighted magnetic resonance measurements
We describe a method to classify the complexity of water diffusion in tissue, or tissue structure, from high angular resolution diffusion weighted O W ) MR measurements. We fit the series of even order spherical harmonics (SHs) to the measured data and use an ANOVA deletion of variables test to determine at what order the series can be truncated. The level of truncation indicates whether the di...
متن کاملEnhanced angular resolution from multiply scattered waves
Multiply scattered waves are often neglected in imaging methods, largely because of the inability of standard algorithms to deal with the associated nonlinear models. This paper shows that by incorporating a known environment into the background model, we not only retain the benefits of imaging techniques based on linear models, but also obtain different views of the target scatterer. The net r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ultramicroscopy
سال: 2019
ISSN: 0304-3991
DOI: 10.1016/j.ultramic.2019.03.007