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A simple method for mapping the B(1) field distribution of linear RF coils
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Radiology, Oncology and Radiation Science, Radiology. (Ahlström)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Radiology, Oncology and Radiation Science, Radiology. (Ahlström)
2005 (English)In: Magnetic Resonance Materials in Physics, Biology and Medicine, ISSN 0968-5243, E-ISSN 1352-8661, Vol. 18, no 6, 283-287 p.Article in journal (Refereed) Published
Abstract [en]

Inhomogeneity of the radio frequency (RF) field B1 leads to intensity variations in MR images and to spatial dependence of spectral line amplitudes. In this paper, a simple method of measuring the B1 field components of an unsegmented linear coil is described. The method is designed for the coils operating up to 20 MHz. The B1 field distribution is replaced by the static magnetic field caused by DC current flowing through the coil. The technique involves rotating the coil 90° so that measured B1 component is aligned with B0 and measuring the shift of resonance frequency using a spectroscopic imaging sequence. Experimental results were in good agreement with the theoretical computations.

Place, publisher, year, edition, pages
2005. Vol. 18, no 6, 283-287 p.
Keyword [en]
B1 field mapping, RF coil, RF inhomogeneity, Spectroscopic imaging
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-77869DOI: 10.1007/s10334-005-0015-xPubMedID: 16344958OAI: oai:DiVA.org:uu-77869DiVA: diva2:105782
Available from: 2006-06-29 Created: 2006-06-29 Last updated: 2017-12-14Bibliographically approved

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Weis, JanAhlström, Håkan

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