Stretchable self-tuning MRI receive coils based on liquid metal technology (LiquiTune)

Area of Science:

• Biomedical Engineering
• Medical Imaging Physics

Background:

• Magnetic resonance imaging (MRI) systems require radiofrequency (RF) coil arrays for signal detection.
• Current commercial RF coils are rigid, leading to anatomical offset, reduced spatial resolution, and compromised image quality and patient comfort.

Purpose of the Study:

• To develop a soft, stretchable RF coil for MRI that conforms closely to anatomical structures.
• To investigate a self-tuning mechanism for stable resonance frequency in stretchable coils.
• To enhance signal-to-noise ratio (SNR) and diagnostic image quality in MRI.

Main Methods:

• Development of a novel RF coil concept using liquid metal and ultra-stretchable polymer.
• Theoretical analysis and numerical simulations to predict coil performance.
• Experimental validation of the coil's properties, including frequency stability and SNR.

Main Results:

• The proposed soft and stretchable coil demonstrated minimal frequency detuning (0.4%) compared to control coils (4%).
• An increase in signal-to-noise ratio (SNR) of over 60% was achieved compared to rigid commercial coils.
• The coil conformed closely to the anatomy, addressing limitations of rigid coils.

Conclusions:

• The liquid metal-based soft and stretchable RF coil offers superior performance and adaptability for MRI.
• This technology has the potential to significantly improve diagnostic image quality and patient experience in MRI.
• The self-tuning geometry ensures stable resonance frequency, overcoming a key challenge in stretchable coil design.