Magnetic Resonance Spectra and Statistical Geometry.

Appl Magn Reson

Physics Department, University at Albany, 1400 Washington Ave, Albany NY 12222.

Published: January 2010

Methods of statistical geometry are introduced which allow one to estimate, on the basis of computable criteria, the conditions under which maximally informative data may be collected. We note the important role of constraints which introduce curvature into parameter space and discuss the appropriate mathematical tools for treating curvature effects. Channel capacity, a term from communication theory, is suggested as a useful figure of merit for estimating the information content of spectra in the presence of noise. The tools introduced here are applied to the case of a model nitroxide system as a concrete example, but we stress that the methods described here are of general utility.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2922777PMC
http://dx.doi.org/10.1007/s00723-009-0102-7DOI Listing

Publication Analysis

Top Keywords

statistical geometry
8
magnetic resonance
4
resonance spectra
4
spectra statistical
4
geometry methods
4
methods statistical
4
geometry introduced
4
introduced allow
4
allow estimate
4
estimate basis
4

Similar Publications

Introduction: The medial patellofemoral ligament (MPFL) is the main patellar stabilizer in low knee flexion degrees (0-30°). Isolated MPFL reconstruction (MPFLr) is therefore considered the gold standard of surgical procedures for low flexion patellofemoral instabilities (PFIs). Despite excellent clinical results, little is known about the effect of MPFLr on kinematic parameters (KPs) of the patellofemoral joint in vivo.

View Article and Find Full Text PDF

Several recent studies have optimized deep neural networks to learn high-dimensional relationships linking structural and functional connectivity across the human connectome. However, the extent to which these models recapitulate individual-specific characteristics of resting-state functional brain networks remains unclear. A core concern relates to whether current individual predictions outperform simple benchmarks such as group averages and null conditions.

View Article and Find Full Text PDF

A generative model of the connectome with dynamic axon growth.

Netw Neurosci

December 2024

Department of Biomedical Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Melbourne, VIC, Australia.

Connectome generative models, otherwise known as generative network models, provide insight into the wiring principles underpinning brain network organization. While these models can approximate numerous statistical properties of empirical networks, they typically fail to explicitly characterize an important contributor to brain organization-axonal growth. Emulating the chemoaffinity-guided axonal growth, we provide a novel generative model in which axons dynamically steer the direction of propagation based on distance-dependent chemoattractive forces acting on their growth cones.

View Article and Find Full Text PDF

Comparison of HDR-brachytherapy and tomotherapy for the treatment of non-melanoma skin cancers of the head and neck.

Radiother Oncol

December 2024

Medical Physics Unit, IRCCS, Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Italy. Electronic address:

Purpose: This study aims to investigate and compare High Dose Rate Brachytherapy (HDR-BT) with Helical Tomotherapy (HT) treatment plans. The focus is on small target volumes near radiation-sensitive organs in the ocular region, to evaluate the advantages of these techniques in treating skin cancer.

Methods: This retrospective observational analysis included patients who underwent skin cancer HDR-BT Freiburg flap treatment between 2019 and 2023.

View Article and Find Full Text PDF

Influence of material-material interactions and wear on coarse waste shredders.

Waste Manag Res

December 2024

Chair of Waste Processing Technology and Waste Management, Department of Environmental and Energy Process Engineering, Montanuniversitaet Leoben, Leoben, Austria.

This article uses model materials to introduce a controlled, location- and manufacturer-independent internationally accepted method for assessing shredding machines based on large-scale tests. Furthermore, a better understanding of the comminution behaviour of shredders with fixed settings (gap width, shaft speed, cutting tool geometry) is in the focus of the present investigation and assessed, using the statistical analyses for particle size distribution in certain screen sections. Conclusions have been drawn on the comminution behaviour in general and the material-material interactions of different fractions in the grinding chamber of the shredder by showing significant differences in the pure fraction's comminution behaviour against the mixture's comminution behaviour.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!