Solenoid Float Cable Trap for MRI

Motivation: Float cable trap has gained widespread adoption in RF coil owing to its unique advantages. However, conventional float trap requires considerable dimensions to achieve an excellent performance. Goal(s): This study is aiming to propose a novel float balun that can achieves high performance but with a compact size. Approach: It was inspired by the well-established solenoid trap. The solenoid structure leverages strong inductive coupling between the cable shield and float resonator, ensuring high efficiency and enabling a compact design. Results: With a compact size of 1.5x3cm2, solenoid float balun shows a measured CMRR of -31 dB (vs. -5 dB using conventional float trap). Impact: The novel, compact and float balun offers significant advantages in the field of MRI RF coil and RF safety. It reduces the overall bulkiness of the RF coil, enables the incorporation of a greater number of elements in receive arrays.