Radio Frequency Probe for Improvement of Signal to Noise Ratio in Magnetic Resonance Image with Inductively Coupled Wireless Coil

摘要

An inductively coupled wireless coil for a bidirectional radio frequency (RF) probe coil has been designed to improve the signal to noise ratio (SNR) in the magnetic resonance image (MRI). A birdcage type of a primary coil and a Helmholtz type of a wireless secondary coil was manufactured. The coils were applied to a phantom study with a 3 T MRI system. SNR was calculated in the magnetic resonance images. The experimental results show that the designed coils are effective to increase SNR and to decrease the mean RF power. The low RF power decreases a specific absorption rate to a subject at high frequency of resonance.