Design of an insertable cone-shaped gradient coil matrix for head imaging with a volumetric finite-difference method

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Biomedical Engineering
• Coil Design

Background:

• Matrix gradient coils are crucial for generating arbitrary magnetic fields in MRI.
• Existing designs face challenges in achieving localized control and efficiency.

Purpose of the Study:

• To propose a novel cone-shaped matrix gradient coil for multifunctional head imaging.
• To design a system that allows localized imaging and optimizes performance parameters.

Main Methods:

• A volumetric finite-difference-based method was employed for coil design.
• The coil was designed with multiple elements to control eddy currents, power dissipation, and wire gap.
• Various current configurations were analyzed to generate gradient fields within specified regions of interest.

Main Results:

• The designed coil demonstrated high flexibility in generating localized gradient fields, enhancing local resolution.
• The cone-shaped structure achieved the lowest total dissipated power among tested configurations.
• Numerical computations confirmed the coil's capability to generate multiple gradient fields efficiently.

Conclusions:

• The proposed cone-shaped matrix gradient coil is a promising solution for advanced head MRI.
• The design offers improved performance, including enhanced resolution and reduced power consumption.
• The patient-friendly structure makes it suitable for clinical head imaging applications.