Solenoid surface coils in magnetic resonance imaging

Area of Science:

• Medical Imaging
• Radiophysics
• Biomedical Engineering

Background:

• Conventional magnetic resonance imaging (MRI) systems utilize fixed saddle or solenoid receiver coils.
• Existing surface coils can suffer from signal dropoff in deep anatomical structures.
• Standard coils may not fit smaller or irregularly shaped body parts, limiting imaging capabilities.

Purpose of the Study:

• To introduce and evaluate a nonplanar solenoidal surface radiofrequency coil as a receiver in MRI.
• To assess the coil's performance compared to conventional receiver coils.
• To determine the coil's efficacy in imaging deep structures and smaller anatomical regions.

Main Methods:

• A nonplanar solenoidal surface radiofrequency coil was employed as a receiver.
• This coil was used in conjunction with a conventional transmitter coil within an MRI system.
• Performance was evaluated based on signal-to-noise ratio, image resolution, and depth penetration.

Main Results:

• The nonplanar solenoidal coil demonstrated an improved signal-to-noise ratio compared to conventional coils.
• This enhancement enabled higher resolution imaging and the creation of thinner image sections.
• The coil effectively eliminated signal dropoff issues in deep structures, unlike planar or noncircumferential coils.

Conclusions:

• The nonplanar solenoidal surface coil offers significant advantages for MRI applications.
• It provides superior image quality and depth penetration, particularly for smaller or deep-seated anatomical areas.
• This coil is especially useful for imaging regions like the neck and knees, which are challenging for standard coils.