About: Checking the quality of gradient magnetic fields

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Imaging techniques based on the principle of nuclear magnetic resonance (MRI) can be used in the study of molecular transport phenomena in biological systems such as self-diffusion processes. The precision of determining the diffusion constants depends on generating the gradient pulse with high precision. For the purpose of determining the characteristics of time behaviour of gradient pulses a simple measuring method was developed and experimentally tested on a 4.7 T tomograph. The method is based on the principle of measuring the instantaneous frequency of MR signal in the presence of gradient pulse after the excitation of a thin defined layer of the examined specimen placed outside the gradient field centre. Using the above method, errors were found in the amplitude and time integral of generated gradient fields and in determining the diffusion constants for biological tissues. Imaging techniques based on the principle of nuclear magnetic resonance (MRI) can be used in the study of molecular transport phenomena in biological systems such as self-diffusion processes. The precision of determining the diffusion constants depends on generating the gradient pulse with high precision. For the purpose of determining the characteristics of time behaviour of gradient pulses a simple measuring method was developed and experimentally tested on a 4.7 T tomograph. The method is based on the principle of measuring the instantaneous frequency of MR signal in the presence of gradient pulse after the excitation of a thin defined layer of the examined specimen placed outside the gradient field centre. Using the above method, errors were found in the amplitude and time integral of generated gradient fields and in determining the diffusion constants for biological tissues. (en) Zobrazovací techniky pracující na bázi magnetické resonance mohou být využity pro studium transportních dějů v biologických systémech pomocí difúzních procesů. Přesné určení difúzních konstant závisí na přesnosti gradientních pulsů. Pro určení časových charakteristik gradientních pulsů byla vyvinuta a experimentálně ověřena měřicí metoda. Ta je založena na měření okamžité frekvence MR signálu za přítomnosti gradientního pulsu po excitaci tenké vrstvy vyšetřovaného vzorku v poloze mimo střed gradientu. Touto metodou byly zjištěny chyby v amplitudě a integrálu gradieního pulsu a při stanovení difúzního koeficientu v biologických tkáních. (cs)
Title	Checking the quality of gradient magnetic fields Checking the quality of gradient magnetic fields (en) Kontrola kvality gradientních magnetických polí (cs)
skos:prefLabel	Checking the quality of gradient magnetic fields Checking the quality of gradient magnetic fields (en) Kontrola kvality gradientních magnetických polí (cs)
skos:notation	RIV/00216305:26220/06:PU61629!RIV07-MSM-26220___
http://linked.open.../vavai/riv/strany	207-210
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z20650511), Z(MSM0021630513)
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Bartušek, Karel Gescheidtová, Eva Kubásek, Radek
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Fakulta elektrotechniky a komunikačních technologií
http://linked.open...dnocenehoVysledku	468494
http://linked.open...ai/riv/idVysledku	RIV/00216305:26220/06:PU61629
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	gradient magnetic field, magnetic resonance (en)
http://linked.open.../riv/klicoveSlovo	gradient magnetic field magnetic resonance
http://linked.open...ontrolniKodProRIV	[02F024A903EA]
http://linked.open...v/mistoKonaniAkce	Gliwice-Ustroń, Polsko
http://linked.open...i/riv/mistoVydani	Gliwice-Ustron
http://linked.open...i/riv/nazevZdroje	INTERNATIONAL CONFERENCE ON FUNDAMENTALS OF ELECTROTECHNICS AND CIRCUIT THEORY 2006
http://linked.open...in/vavai/riv/obor	JA
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2006
http://linked.open...iv/tvurceVysledku	Bartušek, Karel Gescheidtová, Eva Kubásek, Radek
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2006-05-24 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Research into experimental methods for examination of the physical properties of matter and their application in advanced technologies Advanced Electronic Communication Systems and Technologies (ELCOM)
number of pages	4 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Silesian University of Technology
https://schema.org/isbn	83-85940-28-6
http://localhost/t...ganizacniJednotka	26220
is http://linked.open...avai/riv/vysledek of	Checking the quality of gradient magnetic fields Checking the quality of gradient magnetic fields

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