Experimental development of a petal resonator surface coil

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Radiofrequency Coil Design
• Medical Physics

Background:

• Surface coils are crucial for MRI, but their signal-to-noise ratio (SNR) can be limiting.
• Existing coil designs like circular and phased-array coils have inherent limitations in SNR enhancement.

Purpose of the Study:

• To design and evaluate a novel petal resonator surface (PERES) coil for MRI.
• To assess the SNR improvement offered by the PERES coil compared to conventional designs.

Main Methods:

• Developed a PERES coil based on the petal resonator principle, featuring an eight-petal array and a central circular coil.
• Utilized the quasistatic method to derive an analytical function for PERES coil SNR.
• Conducted imaging experiments on a spectroscopy phantom and healthy volunteer brains using a 1.5-T commercial imager.

Main Results:

• Theoretical analysis predicted a 26% and 35% SNR enhancement over circular and phased-array coils, respectively.
• Experimental imaging confirmed significant SNR improvements.
• The PERES coil demonstrated compatibility with standard clinical MRI systems and protocols.

Conclusions:

• The PERES coil represents a significant advancement in MRI surface coil technology.
• This new coil design offers a substantial increase in SNR, providing a valuable alternative for improved MRI diagnostics.
• The PERES coil is compatible with existing clinical MRI infrastructure.