# 자기공명영상촬영을 위한 Phased-Array Quadrature RF 코일

• Kim, S.K. (Department of Electronics and Information Engineering, Korea University) ;
• Yang, Y.J. (Department of Electronics and Information Engineering, Korea University) ;
• Lee, D.R. (Department of Electronics and Information Engineering, Korea University) ;
• Ahn, C.B. (Kwang-woon University) ;
• Lee, H.K. (Medison Ltd.) ;
• Oh, C.H. (Department of Electronics and Information Engineering, Korea University)
• Published : 1997.05.23

#### Abstract

A new phased-array quadrature RF coil for one or two RF acquisition channels is developed for spine MR imaging. Quadrature RF coils for MRI have been useful to improve the signal-to-noise ratio (SNR) by $"\sqrt{2}"$ using two orthogonal RF coils in combination [1]. More recently, the phased-array RF coil has been proposed for more improvement of SNR by using an array of RF coil elements with a reduced size and coverage for each element. Two new schemes are proposed for the new phased-array quadrature RF coil as follows : (1) Proper overlapping of two quadrature RF coils thus removing the mutual inductance and (2) Attaching preamplifiers right after the coil section and combining the signal with proper phase delays. The coil has been implemented for receive- only mode. It has been tested through phantom and volunteer imaging. The experimental results show the utility of the proposed RF coil.