An Investigation of Triple-Tuned Traps for MRI Receiver Coil Design

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Medical Physics
• Biophysics

Background:

• Multinuclear MRI/S is valuable for noninvasive diagnostics and disease monitoring.
• Low sensitivity of X-nuclei scans limits its clinical application.
• Optimization of multi-nuclear coil designs is crucial for enhancing sensitivity.

Purpose of the Study:

• To present a novel parallel trap network design for a simultaneous triple-tuned MRI coil.
• To enable simultaneous 1H, 31P, and 23Na imaging at 4.7 Tesla (T).
• To evaluate the signal-to-noise ratio (SNR) performance of the new coil design.

Main Methods:

• Designed and constructed a simultaneous triple-tuned coil using a parallel trap network.
• Tested the coil's performance on a 4.7T scanner.
• Bench and in-scanner characterization of relative SNR for 1H, 31P, and 23Na.

Main Results:

• The parallel trap network demonstrated a relative SNR gain of over 20% for 1H imaging compared to a series network.
• X-nuclei (31P and 23Na) exhibited a decrease in SNR of less than 10%.
• The coil successfully achieved simultaneous triple-tuning for 1H, 31P, and 23Na.

Conclusions:

• The developed parallel trap network offers improved SNR for 1H imaging in multinuclear MRI.
• The design maintains acceptable SNR for crucial X-nuclei like 31P and 23Na.
• Further optimization of inductor design is proposed to enhance X-nuclei sensitivity.