Title :
Optimization of a Transverse Electromagnetic Resonator for Magnetic Resonance Imaging at High Field of 9.4 T
Author :
Bouhmidi, Rachid ; Benahmed, Nasreddine ; Aliane, Kamila ; Meriah, Sidi Mohammed ; Bendimerad, Fethi Tarik ; Benabdallah, Nadia
Author_Institution :
Dept. of Telecommun., Univ. Abou Bekr Belkaid-Tlemcen, Tlemcen, Algeria
Abstract :
In this paper, we have implemented a numerical tool using finite element method (FEM) for designing an antenna for MRI (Magnetic Resonance Imaging) probe operating at high field. The birdcage antenna type is a transverse electromagnetic (TEM) coupled lines resonator, and the developed model in the absence of a biological load is based on the propagation equations of voltages and currents on the coupled lines of the resonator. This numerical tool simulates the frequency response of the reflection coefficient of the RF (Radio Frequency) excitation port of the resonator, which allows us to estimate the level of adaptation of the antenna for imaging small animals at a field of 9.4 T.
Keywords :
antennas; biomedical MRI; coupled transmission lines; electromagnetic wave reflection; finite element analysis; frequency response; multiconductor transmission lines; radiowave propagation; resonators; FEM; MRI probe; RF excitation port; TEM coupled line resonator; antenna adaptation level estimation; antenna design; birdcage type antenna; current propagation equations; finite element method; frequency response; magnetic flux density 9.4 T; magnetic resonance imaging; numerical tool; radiofrequency excitation port; reflection coefficient; transverse electromagnetic resonator optimization; voltage propagation equations; Equations; Integrated circuit modeling; Magnetic resonance imaging; Mathematical model; Multiconductor transmission lines; Resonant frequency; Transmission line matrix methods;
Conference_Titel :
Engineering and Technology (S-CET), 2012 Spring Congress on
Conference_Location :
Xian
Print_ISBN :
978-1-4577-1965-3
DOI :
10.1109/SCET.2012.6342152
