A geometrically adjustable 16-channel transmit/receive transmission line array for improved RF efficiency and...

Area of Science:

• Magnetic Resonance Imaging (MRI) hardware development
• Radiofrequency (RF) coil engineering
• High-field MRI systems

Background:

• Fixed geometry radiofrequency (RF) coils limit performance in high-field MRI.
• Optimizing parallel imaging and signal-to-noise ratio (SNR) is crucial for advanced MRI applications.
• Transmission Line Arrays (TLAs) offer potential but face geometric constraints.

Purpose of the Study:

• To introduce and evaluate a novel geometrically adjustable transceiver array system for 7 Tesla (7T) MRI.
• To assess the impact of geometric adjustability on parallel imaging performance, RF transmit efficiency, and SNR.
• To compare the performance of the adjustable coil against fixed geometry TLAs.

Main Methods:

• Development of a geometrically adjustable transceiver array system incorporating decoupling capacitors.
• Design of a 16-element head array utilizing transmission line technology.
• Comparative analysis at 7T, evaluating parallel imaging, RF transmit efficiency, and SNR against fixed geometry TLAs.

Main Results:

• Significant improvements in parallel imaging performance were observed with the adjustable coil.
• Substantial gains in signal-to-noise ratio (SNR) were achieved.
• Adjustability and a three-sided ground plane design in individual elements contributed to enhanced performance.

Conclusions:

• The novel geometrically adjustable transceiver array system demonstrates superior performance at 7T MRI.
• The design's adjustability and element configuration are key factors for improved imaging capabilities.
• This technology offers a promising advancement for high-field MRI applications.