论文信息 - A New Decoupling Method for Quadrature Coils in Magnetic Resonance Imaging

A New Decoupling Method for Quadrature Coils in Magnetic Resonance Imaging

A powerful decoupling method is introduced to obtain decoupled signal voltages from quadrature coils in magnetic resonance imaging (MRI). The new method uses the knowledge of the position of the signal source in MRI, the active slice, to define a new mutual impedance which accurately quantifies the coupling voltages and enables them to be removed almost completely. Results show that by using the new decoupling method, the percentage errors in the decoupled voltages are of the order of 10-7% and isolations between two coils are more than 170 dB

[1] Roger F. Harrington,et al. Field computation by moment methods , 1968 .

[2] S. Deger,et al. Effect of Mutual Coupling on the Performance of Adaptive Arrays , 2006, 2006 IEEE 14th Signal Processing and Communications Applications.

[3] H. Hui,et al. Improved Compensation for the Mutual Coupling Effect in a Dipole Array for Direction Finding , 2022 .

[4] Andrew Webb,et al. Design of a capacitively decoupled transmit/receive NMR phased array for high field microscopy at 14.1T. , 2004, Journal of magnetic resonance.

[5] P. Roemer,et al. The NMR phased array , 1990, Magnetic resonance in medicine.

[6] Juha Koikkalainen,et al. Reconstruction of 3-D head geometry from digitized point sets: an evaluation study , 2004, IEEE Transactions on Information Technology in Biomedicine.

[7] K. Uğurbil,et al. Polarization of the RF field in a human head at high field: A study with a quadrature surface coil at 7.0 T , 2002, Magnetic resonance in medicine.

[8] Hui. A new definition of mutual impedance for application in dipole receiving antenna arrays , 2004, IEEE Antennas and Wireless Propagation Letters.