Affiliations: [a] IR4M Paris 11 University UMR CNRS, Bât Orsay,
France | [b] Electrical and Computer Engineering Department,
El-Harrach, Algiers, Algeria
Correspondence:
[*]
Corresponding author: Zakia Abidi, IR4M Paris 11 University UMR
8081 CNRS, Bât 220 Orsay, France. Tel.: +33 16 9157978; Fax: +33 16 9154;
E-mail: zakia.abidi@u-psud.fr
Abstract: A numerical technique, based on the combination of a finite element
method and a boundary integral method has been developed to compute the induced
signal in MRI antennas. This signal rises from a free movement of precession of
the transverse magnetization of the sample to explore. In our modeling, the
transverse magnetization represents the magnetic source field. Its flux
embraces the antenna to give rise to a sinusoidal current which is very quickly
attenuated in time (a few ms); it represents the signal containing all the
informations of the sample. We here want to find the geometrical and
electromagnetic characteristics of the antennas which permit to have a signal
to noise ratio as great as possible. In our computation, we have taken into
account leading factors such as the distance between the probe and the organ to
be explored and also the geometrical and electromagnetic characteristics of the
probe.
Keywords: MRI antennas, boundary integral method, finite element method
