Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Alena V. Shchelokova"'
Autor:
Redha Abdeddaim, Alena V. Shchelokova, Irina V. Melchakova, Pavel A. Belov, Juan D. Baena, Vsevolod Vorobyev, Alexander Efimtcev, Stanislav Glybovski
Publikováno v:
Magnetic Resonance in Medicine
Magnetic Resonance in Medicine, 2022, 87 (1), pp.496-508. ⟨10.1002/mrm.28946⟩
Magnetic Resonance in Medicine, 2022, 87 (1), pp.496-508. ⟨10.1002/mrm.28946⟩
Purpose Radiofrequency field inhomogeneity is a significant issue in imaging large fields of view in high- and ultrahigh-field MRI. Passive shimming with coupled coils or dielectric pads is the most common approach at 3 T. We introduce and test light
Autor:
Andrew G. Webb, Irina V. Melchakova, A. V. Kozachenko, Cornelis A. T. van den Berg, Alena V. Shchelokova, Alexander J.E. Raaijmakers, Pavel A. Belov, Alexey P. Slobozhanyuk
Publikováno v:
Physical Review Applied. 16
Standard techniques to image the eigenmodes of a metasurface are based on collecting signals from various spatial positions via a probe on a motorized platform---typically a slow procedure, and only a two-dimensional near-field profile can be measure
Autor:
Juan D. Baena, Alexey P. Slobozhanyuk, Juan P. del Risco, Andrew G. Webb, Irena Zivkovic, Redha Abdeddaim, Stanislav Glybovski, Alena V. Shchelokova, Vsevolod Vorobyev
Publikováno v:
Journal of Magnetic Resonance, 320. ACADEMIC PRESS INC ELSEVIER SCIENCE
Journal of Magnetic Resonance
Journal of Magnetic Resonance, Elsevier, 2020, 320, pp.106835. ⟨10.1016/j.jmr.2020.106835⟩
Journal of Magnetic Resonance, 320:106835. Academic Press Inc.
Journal of Magnetic Resonance, 2020, 320, pp.106835. ⟨10.1016/j.jmr.2020.106835⟩
Journal of Magnetic Resonance
Journal of Magnetic Resonance, Elsevier, 2020, 320, pp.106835. ⟨10.1016/j.jmr.2020.106835⟩
Journal of Magnetic Resonance, 320:106835. Academic Press Inc.
Journal of Magnetic Resonance, 2020, 320, pp.106835. ⟨10.1016/j.jmr.2020.106835⟩
High-permittivity dielectric pads, i.e., thin, flexible slabs, usually consisting of mixed ceramic powders and liquids, have been previously shown to increase the magnetic field at high and ultra high-fields in regions of low efficiency of transmit c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b074344fa218ca24f08839ef4fb9c92
https://www.sciencedirect.com/science/article/pii/S1090780720301531?via=ihub
https://www.sciencedirect.com/science/article/pii/S1090780720301531?via=ihub
Autor:
Arthur W. Magill, Georgiy Solomakha, A. Nikulin, Anna Andreychenko, Viktor Puchnin, Alena V. Shchelokova
Publikováno v:
Journal of Magnetic Resonance
In this work, we propose an application of a metamaterial inspired volumetric wireless coil (WLC) based on coupled split-loop resonators for targeted breast MRI at 1.5 T. Due to strong electromagnetic coupling with the body coil, the metamaterial ins
Autor:
Egor I. Kretov, Viacheslav Ivanov, Alena V. Shchelokova, Alexey P. Slobozhanyuk, Ivan V. Sushkov, Irina V. Melchakova, Svetlana Serebryakova, Elizaveta Nenasheva, Anna Mikhailovskaya, Pavel A. Belov, Anna Andreychenko
Publikováno v:
Nature Communications
Nature Communications, Vol 11, Iss 1, Pp 1-7 (2020)
Nature Communications, Vol 11, Iss 1, Pp 1-7 (2020)
Currently, human magnetic resonance (MR) examinations are becoming highly specialized with a pre-defined and often relatively small target in the body. Conventionally, clinical MR equipment is designed to be universal that compromises its efficiency
Publikováno v:
INTERNATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF COMBUSTION AND PROCESSES IN EXTREME ENVIRONMENTS (COMPHYSCHEM’20-21) and VI INTERNATIONAL SUMMER SCHOOL “MODERN QUANTUM CHEMISTRY METHODS IN APPLICATIONS”.
Dielectric resonators based on high permittivity materials with low losses have recommended themselves as good candidates for improving magnetic resonance imaging (MRI) characteristics. Mainly due to the ability to focus and enhance the radiofrequenc
Publikováno v:
INTERNATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF COMBUSTION AND PROCESSES IN EXTREME ENVIRONMENTS (COMPHYSCHEM’20-21) and VI INTERNATIONAL SUMMER SCHOOL “MODERN QUANTUM CHEMISTRY METHODS IN APPLICATIONS”.
In this work, we show an improvement of the transmit efficiency and receive sensitivity of the conventional birdcage body coil by using a volumetric self-resonant periodic structure of the inductively coupled split-loop resonators. This concept can b
Autor:
Andrew G. Webb, Irena Zivkovic, Alena V. Shchelokova, J. P. del Risco, Stanislav Glybovski, Vsevolod Vorobyev, Juan D. Baena, Alexey P. Slobozhanyuk, Redha Abdeddaim
Publikováno v:
INTERNATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF COMBUSTION AND PROCESSES IN EXTREME ENVIRONMENTS (COMPHYSCHEM’20-21) and VI INTERNATIONAL SUMMER SCHOOL “MODERN QUANTUM CHEMISTRY METHODS IN APPLICATIONS”.
This article present a new approach replacing high-permittivity water-based dielectric pads with a non-resonant low-cost artificial dielectric to improve MR image quality by modifying the interferences present in the radiofrequency field at 7T MRI. T
Autor:
Alena V. Shchelokova, Alexey P. Slobozhanyuk, Anna Andreychenko, V. A. Fokin, Ekaterina A. Brui, Irina V. Melchakova, A. V. Sokolov, Pavel A. Belov
Publikováno v:
JETP Letters. 108:423-427
A hybrid metasurface realized by a double array of brass wires inserted into two high-permittivity dielectric slabs at both sides was used to perform a magnetic resonance spectroscopy experiment at a 1.5 T clinical magnetic resonance scanner. The met
Autor:
Alexey P. Slobozhanyuk, Andrew G. Webb, Ivan V. Sushkov, Anna Mikhailovskaya, Alena V. Shchelokova, Dmitry Dobrykh
Publikováno v:
Journal of Magnetic Resonance, 291, 47-52. ACADEMIC PRESS INC ELSEVIER SCIENCE
Journal of Magnetic Resonance
Journal of Magnetic Resonance, 291, 47-52
Journal of Magnetic Resonance
Journal of Magnetic Resonance, 291, 47-52
Dielectric resonators have previously been constructed for ultra-high frequency magnetic resonance imaging and microscopy. However, it is challenging to design these dielectric resonators at clinical field strengths due to their intrinsically large d