TY - GEN
T1 - Near-field beamformer design for circular MRI antenna arrays based on minmax optimization
AU - Liao, Yanping
AU - Liu, Wei
PY - 2010/8
Y1 - 2010/8
N2 - In this paper, a convex-optimization based design method is proposed to solve the near-field beamformer design problem for improving the performance of an MRI system. The aim is to find the minimum number of antennas required for a uniform circular array which is capable of forming a beam with a pre-defined sidelobe attenuation level for an arbitrary focal point within a given circular scanning area. The minimax criterian (minimizing the maximum response at the sidelobe region) is employed in the design. Design examples have shown that the proposed method can solve the problem successfully.
AB - In this paper, a convex-optimization based design method is proposed to solve the near-field beamformer design problem for improving the performance of an MRI system. The aim is to find the minimum number of antennas required for a uniform circular array which is capable of forming a beam with a pre-defined sidelobe attenuation level for an arbitrary focal point within a given circular scanning area. The minimax criterian (minimizing the maximum response at the sidelobe region) is employed in the design. Design examples have shown that the proposed method can solve the problem successfully.
KW - Circular MRI antenna array
KW - Convex optimization
KW - Near-field beam pattern
UR - http://www.scopus.com/inward/record.url?scp=77957255089&partnerID=8YFLogxK
U2 - 10.1109/ICSPS.2010.5555629
DO - 10.1109/ICSPS.2010.5555629
M3 - Conference article published in proceeding or book
AN - SCOPUS:77957255089
SN - 9781424468911
T3 - ICSPS 2010 - Proceedings of the 2010 2nd International Conference on Signal Processing Systems
SP - V1325-V1328
BT - ICSPS 2010 - Proceedings of the 2010 2nd International Conference on Signal Processing Systems
T2 - 2010 2nd International Conference on Signal Processing Systems, ICSPS 2010
Y2 - 5 July 2010 through 7 July 2010
ER -