Results 1 to 10 of about 2,008,958 (317)

Resonances of rectangular resonators [PDF]

The Journal of the Acoustical Society of America, 1981
We have used variational methods based on the work of Holland and Eernisse to predict the resonant frequencies of rectangular resonators for use in acoustic transducer arrays. We have predicted both the open and short circuited resonances and have compared the theoretical results obtained with a large number of experiments carried out on such ...
P. A. Bennett, G. S. Kino
openaire   +1 more source

Lowering the thermal noise barrier in functional brain mapping with magnetic resonance imaging

Nature Communications, 2021
The signal-to-noise ratio is a key consideration when selecting a magnetic resonance imaging protocol. Thermal noise is major issue, especially in high resolution functional images.
Luca Vizioli, Steen Moeller, Logan Dowdle, Mehmet Akçakaya, Federico De Martino, Essa Yacoub, Kamil Uğurbil   +6 more
doaj   +1 more source

Correction to: Diagnostic performance of semi-quantitative and quantitative stress CMR perfusion analysis: a meta-analysis

Journal of Cardiovascular Magnetic Resonance, 2018
In the original publication of this article there was an error in Figures 8, 9, 10 and 11. During typesetting the Figures 8, 9, 10 and 11 have been incorrectly swapped.
Journal of Cardiovascular Magnetic Resonance
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Nucleon resonances in the fourth-resonance region [PDF]

The European Physical Journal A, 2011
Nucleon and $Δ$ resonances in the fourth resonance region are studied in a multichannel partial-wave analysis which includes nearly all available data on pion- and photo-induced reactions off protons. In the high-mass range, above 1850\,MeV, several alternative solutions yield a good description of the data.
Anisovich, A. V., Klempt, E., Nikonov, V. A., Sarantsev, A. V., Thoma, U.   +4 more
openaire   +2 more sources

Plaque Characteristics in Young Adults With Symptomatic Intracranial Atherosclerotic Stenosis: A Preliminary Study

Frontiers in Neurology, 2022
PurposeTo determine how intracranial vascular wall and atherosclerosis plaque characteristics differ between young and old adults with sICAS.MethodsEighty-four consecutive patients with sICAS who underwent high-resolution magnetic resonance imaging ...
Ling Li, Min Tang, Xuejiao Yan, Jie Gao, Niane Ma, Xiaorui Shi, Yaxin Niu, Yu Wen, Kai Ai, Xiaoyan Lei, Xiaoling Zhang   +10 more
doaj   +1 more source

A phantom based laser marking workflow to visually assess geometric image distortion in magnetic resonance guided radiotherapy

Physics and Imaging in Radiation Oncology, 2021
Magnetic resonance (MR)-only workflows require quality assurance due to potential dosimetric impacts of using geometry distorted MR images in radiotherapy planning.
Matthias Drobnitzky, Axel vom Endt, Andrew Dewdney   +2 more
doaj   +1 more source

Static and dynamic changes of intrinsic brain local connectivity in internet gaming disorder

BMC Psychiatry, 2023
Background Studies have revealed that intrinsic neural activity varies over time. However, the temporal variability of brain local connectivity in internet gaming disorder (IGD) remains unknown. The purpose of this study was to explore the alterations of
Xiaoyu Niu, Xinyu Gao, Mengzhe Zhang, Jinghan Dang, Jieping Sun, Yan Lang, Weijian Wang, Yarui Wei, Jingliang Cheng, Shaoqiang Han, Yong Zhang   +10 more
doaj   +1 more source

Altered Cerebro-Cerebellar Effective Connectivity in New-Onset Juvenile Myoclonic Epilepsy

Brain Sciences, 2022
(1) Objective: Resting-state fMRI studies have indicated that juvenile myoclonic epilepsy (JME) could cause widespread functional connectivity disruptions between the cerebrum and cerebellum.
Laiyang Ma, Guangyao Liu, Pengfei Zhang, Jun Wang, Wenjing Huang, Yanli Jiang, Yu Zheng, Na Han, Zhe Zhang, Jing Zhang   +9 more
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Resonance superfluidity: Renormalization of resonance scattering theory [PDF]

Physical Review A, 2002
15 pages, 10 ...
Kokkelmans S, Milstein JN, CHIOFALO, MARIA LUISA, Walser R, Holland MJ   +4 more
openaire   +2 more sources

The role of magnetic resonance imaging in assessing venous vascular abnormalities in the head and neck: a demonstration of cerebrospinal venous insufficiency in a subset of multiple sclerosis patients

Veins and Lymphatics, 2015
The study of chronic cerebrospinal venous insufficiency (CCSVI) and its impact on the development and progression of multiple sclerosis (MS) remains controversial.
E. Mark Haacke, Sean K. Sethi, Jing Jiang, Ying Wang, David T. Utriainen   +4 more
doaj   +1 more source