Počet záznamů: 1
Determination of pre-emphasis constants for eddy current reduction
- 1.
SYSNO ASEP 0350811 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Determination of pre-emphasis constants for eddy current reduction Tvůrce(i) Bartušek, Karel (UPT-D) RID, ORCID, SAI
Kubásek, R. (CZ)
Fiala, P. (CZ)Celkový počet autorů 3 Zdroj.dok. Measurement Science and Technology. - : Institute of Physics Publishing - ISSN 0957-0233
Roč. 21, č. 10 (2010), 105601:1-9Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova magnetic field gradient ; magnetic resonance imaging ; measurement technique Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika CEP GA102/09/0314 GA ČR - Grantová agentura ČR CEZ AV0Z20650511 - UPT-D (2005-2011) UT WOS 000281787100042 EID SCOPUS 78149363774 DOI 10.1088/0957-0233/21/10/105601 Anotace Magnetic field gradients play a fundamental role in fast magnetic resonance imaging (MRI) methods and spectroscopy imaging. Precise information on gradient waveform shape and rise times is often very useful in experimental MRI. We present a simple method for the measurement of the gradient time course and static magnetic field changes. The method does not require any specialized hardware and can be used with a standard volume coil and a special phantom filled with deionized or doped water. The method is based on an analysis of the instantaneous frequency variation of an MR signal in the time domain, acquired from a mechanically selected thin slice of phantom located at the gradient isocentre. The measurement and approximation of the course of time gradients and of the changes in the static magnetic field result in pre-emphasis constants that substitute the constants determined manually in a time-consuming manner. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2011
Počet záznamů: 1