Approaches to designing micro-solenoidal RF probes for 14 T MRI studies of millimeter-range sized objects

作者：Seifi Bahram; Semouchkina Elena^*; Lanagan Michael; Neuberger Thomas

来源：Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering , 2016, 46(4): 178-185.

DOI：10.1002/cmr.b.21349

• high-field MRI
• magnetic field homogeneity
• matching circuit
• self-resonance frequency
• solenoid coil

Full-wave electromagnetic simulations have been employed to analyze the design approaches that allow for solving the problems preventing inductive performance of micro-solenoidal RF probes and formation of strong and homogeneous magnetic fields inside probes at the studies of millimeter-range sized objects in 14 T MRI scanners. In particular, the effects of non-uniform coil wrapping on field homogeneity inside extended coils and of partitioning the coils by dielectric separators on coil self-resonances have been investigated. The possibility to utilize tunable C-C matching circuits with the coils and to mitigate the effects of sample insertion on the probe resonance frequency has been demonstrated. Challenges of coil fabrication have been also addressed.

• 出版日期2016-10