Valentina
Hartwig1,2, Nicola Vanello3, Giulio Giovannetti1,
Maria Fillomena Santarelli1, Luigi Landini3
1Institute of Clinical Physiology, CNR,
Pisa, Italy, Italy; 2Department of Electrical Systems and
Automation, University of Pisa, Pisa,
Italy, Italy; 3Department of Information Engineering, University
of Pisa, Pisa, Italy, Italy
Knowledge
of transmission field B1+, and reception sensitivity maps is important in
high field (>=3T) human Magnetic Resonance (MR) imaging for several
aspects: these include post acquisition correction of intensity inhomogeneities,
that may affect the quality of images, and modelling and design of
radiofrequency (RF) coils and pulses. Moreover, in recent works, it has been
demonstrated that B1 maps can be used for the direct calculation of tissues
electrical parameters and for estimating the local Specific Absorption Rate
(SAR) in vivo. In this study a comparison among known methods for B1+/flip
angle and reception sensitivity mapping is introduced.