Results 61 to 70 of about 95,566 (266)

The Application of Adaptive Time Gain Compensation in an Improved Breast Ultrasound Tomography Algorithm

Applied Sciences, 2019
In order to better detect information about a mass in breast tissue, an ultrasound tomography algorithm based on adaptive time gain compensation (TGC) was designed.
Chang Liu, Binzhen Zhang, Chenyang Xue, Guojun Zhang, Wendong Zhang, Yijun Cheng   +5 more
doaj   +1 more source

Upper Cervical Cord Area as a Biomarker of Conversion to Secondary Progressive Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective This study assessed whether upper cervical cord area (UCCA) measured on routine brain MRI can serve as a biomarker of conversion to SPMS. Methods This is a single‐center retrospective cohort study of RRMS patients with cross‐sectional and longitudinal analyses of clinical and MRI data. Future SPMS converters were matched by age, sex,
Nabil K. El Ayoubi, Sola Al Ghazal, Salem Hannoun, Medhat A. Siddik, Nour M. Najjar, Jim Dagher, Joseph Abboud, Myriam G. Semaan, Samia J. Khoury   +8 more
wiley   +1 more source

Rayleigh wave attenuation and phase velocity maps of the greater Alpine region from ambient noise

Scientific Reports
We use seismic ambient noise data from 724 publicly available broadband seismic stations across central Europe to create detailed phase velocity and attenuation maps of Rayleigh waves, focusing on short periods down to 3 s.
Henrique Berger Roisenberg, Fabrizio Magrini, Irene Molinari, Lapo Boschi, Fabio Cammarano   +4 more
doaj   +1 more source

The Multiple Sclerosis Severity Allele rs10191329A and Cognitive Function: A UK Biobank Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT The genome‐wide association study of Multiple Sclerosis severity linked the genetic variant rs10191329A to long‐term disability and implicated brain resilience as a determinant of outcome. We hypothesised that rs10191329A might influence cognition in other neurological diseases and healthy controls.
Ioanna Zimianiti, Sheena Waters, Adil Harroud, Pernilla Stridh, Ruth Dobson, Benjamin M. Jacobs   +5 more
wiley   +1 more source

pair attenuation coefficient

, 2014
Citation: 'pair attenuation coefficient' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.P04396 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests
openaire   +1 more source

Imaging the attenuation coefficients of positron beams in matter: positron attenuation tomography [PDF]

EJNMMI Physics, 2015
A new positron annihilation imaging modality is described that enables nondestructive measurement of the linear attenuation coefficients (LACs) of positron beams in heterogeneous materials. This positron attenuation tomography (PAT) technique utilizes a positron emission tomography (PET) system embedded within a uniform static magnetic field, such as ...
openaire   +2 more sources

Clinical and Modifiable Factors Associated With Disability and Relapse in MOGAD: A Multicentre Cohort Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Factors associated with relapse course and disability in myelin oligodendrocyte glycoprotein antibody‐associated disease (MOGAD) remain incompletely understood. Objectives To identify clinical and modifiable factors associated with relapse and disability in MOGAD. Methods In this ambispective multicentre cohort study using data from
Yingtao Wang, Shaoxin Tao, Qiujia Wang, Xiaoyu Xu, Hui Yao, Zheng Liu, Dawei Li, Zhandong Qiu, Jinming Han, Jiangwei Xia, Qi Wang, Jun Sun, Kai Shao, Jiao Li, Shishuang Ruan, Yi Zhong, Jun Guo, Shougang Guo, Yue Huang, Guoliang Chai, Tao Jin, Hongyu Zhou, Junwei Hao, Yinan Zhao   +23 more
wiley   +1 more source

Mass attenuation coefficient of electromagnetic radiation for human tissues

Journal of Radiation Research and Applied Sciences
This study aims to calculate the electromagnetic radiation attenuation coefficients for various tissues (16) of the human body (Skeleton cortical bone, Brain, Blood, Lung, Heart, Liver, Muscle, Ovary, Thyroid, Spleen, Kidney, Pancreas, Skin, Eye lens ...
Shlair I. Mohammed, Ali H. Taqi
doaj   +1 more source

Attenuation law of MWD pulses in aerated drilling

Petroleum Exploration and Development, 2012
A mathematical model for predicting the attenuation of measurement while drilling (MWD) pressure pulses in aerated drilling was proposed using the two-phase flow model and considering the momentum and energy exchange at the phase interface, gravity of ...
Hongtao LI, Gao LI, Yingfeng MENG, Gang SHU, Kuanliang ZHU, Xiaofeng XU   +5 more
doaj   +1 more source

Arctic Observations Identify Phytoplankton Community Composition as Driver of Carbon Flux Attenuation

Geophysical Research Letters, 2020
The attenuation coefficient b is one of the most common ways to describe how strong the carbon flux is attenuated throughout the water column. Therefore, b is an essential input variable in many carbon flux and climate models. Marsay et al. (2015, https:/
I. Wiedmann, E. Ceballos‐Romero, M. Villa‐Alfageme, A. H. H. Renner, C. Dybwad, H. van derJagt, C. Svensen, P. Assmy, J. M. Wiktor, A. Tatarek, M. Różańska‐Pluta, M. H. Iversen   +11 more
doaj   +1 more source