Results 41 to 50 of about 61,211 (254)

Penetration depth of low-coherence enhanced backscattered light in sub-diffusion regime

, 2007
The mechanisms of photon propagation in random media in the diffusive multiple scattering regime have been previously studied using diffusion approximation. However, similar understanding in the low-order (sub-diffusion) scattering regime is not complete
A. Wax, D. S. Wiersma, G. Yoon, H. Subramanian, Hariharan Subramanian, K. M. Yoo, K. Sokolov, M. Born, P. E. Wolf, Prabhakar Pradhan, Vadim Backman, Young L. Kim   +11 more
core   +1 more source

Curvature-induced stiffening of a fish fin [PDF]

, 2017
How fish modulate their fin stiffness during locomotive manoeuvres remains unknown. We show that changing the fin's curvature modulates its stiffness. Modelling the fin as bendable bony rays held together by a membrane, we deduce that fin curvature is ...
Bainbridge R, Gosline WA, Khoi Nguyen, Lauder GV, Lund R, Madhusudhan Venkadesan, Mahesh M. Bandi, Ning Yu, Shreyas Mandre, Timoshenko S, Videler J   +10 more
core   +3 more sources

Glymphatic Dysfunction Reflects Post‐Concussion Symptoms: Changes Within 1 Month and After 3 Months

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Mild traumatic brain injury (mTBI) may alter glymphatic function; however, its progression and variability remain obscure. This study examined glymphatic function following mTBI within 1 month and after 3 months post‐injury to determine whether variations in glymphatic function are associated with post‐traumatic symptom severity ...
Eunkyung Kim, Han Gil Seo, Roh‐Eul Yoo, Byung‐Mo Oh   +3 more
wiley   +1 more source

Brain tissue pulsatility is related to clinical features of Parkinson's disease

NeuroImage: Clinical, 2018
Introduction: This study investigated whether brain tissue pulsatility is associated with features of disease severity in Parkinson's disease (PD). Methods: Data were extracted from the Parkinson's Progression Markers Initiative among 81 adults with PD ...
Zahra Shirzadi, Andrew D. Robertson, Arron W. Metcalfe, Sarah Duff-Canning, Connie Marras, Anthony E. Lang, Mario Masellis, Bradley J. MacIntosh   +7 more
doaj   +1 more source

Diffusion Tensor Imaging: on the assessment of data quality - a preliminary bootstrap analysis [PDF]

, 2003
In the field of nuclear magnetic resonance imaging, diffusion tensor imaging (DTI) has proven an important method for the characterisation of ultrastructural tissue properties.
Auer, Dorothee P., Hahn, Klaus, Heim, Susanne   +2 more
core   +2 more sources

Diffusion Spectrum Imaging Maps Early Axonal Loss and a Unique Progressive Signal in Neuronal Intranuclear Inclusion Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang, Yixiu Pei, Xiaobao Hu, Ying Xiong, Fang Wang, Yanyan Yu, Min Zhu, Dandan Tan, Meihong Zhou, Daojun Hong, Fuqing Zhou   +10 more
wiley   +1 more source

Identification of anisotropic tensile strength of cortical bone using Brazilian test. [PDF]

, 2014
For a proper analysis of cortical bone behaviour, it is essential to take into account both the elastic stiffness and the failure criteria. While ultrasound methods allow complete identification of the elastic orthotropic coefficients, tests used to ...
ALLENA, Rachele, CLUZEL, Christophe
core   +5 more sources

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

Microstructure of the human metastatic vertebral body

Frontiers in Endocrinology
IntroductionBone spinal metastases disrupt the bone homeostasis, inducing a local imbalance in the bone formation and/or resorption, with consequent loss of the structural optimisation of the vertebrae and increase of the risk of fracture.
Giulia Cavazzoni, Giulia Cavazzoni, Giulia Cavazzoni, Enrico Dall’Ara, Enrico Dall’Ara, Marco Palanca, Marco Palanca, Marco Palanca   +7 more
doaj   +1 more source

Towards in vivo g-ratio mapping using MRI: unifying myelin and diffusion imaging [PDF]

, 2020
The g-ratio, quantifying the comparative thickness of the myelin sheath encasing an axon, is a geometrical invariant that has high functional relevance because of its importance in determining neuronal conduction velocity.
Callaghan, Martina F., Mohammadi, Siawoosh   +1 more
core   +3 more sources