An improved asymmetric gradient coil design for high-resolution MRI head imaging

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Electromagnetism

Background:

• Head magnetic resonance imaging (MRI) utilizes local gradient coils for high-resolution imaging.
• Asymmetric gradient coil configurations are common for head coils to ensure uniformity near the patient.
• Limited space in insertable head coils presents challenges for maintaining high gradient performance.

Purpose of the Study:

• To present a novel, practical design for an asymmetric insertable gradient head coil.
• To improve gradient performance and construction characteristics within space constraints.
• To offer a superior alternative to conventional head coil designs.

Main Methods:

• Proposed a new asymmetric insertable gradient head coil design.
• Modified coil connections at the patient and service ends.
• Conducted simulations to compare the new design with conventional configurations.

Main Results:

• The proposed design features an improved coil pattern with distributed conductors at the patient end.
• The service end is designed to be open for better accessibility.
• Simulations demonstrated comparable field uniformity with enhanced construction and electrical performance (lower inductance, higher efficiency).

Conclusions:

• The novel asymmetric insertable gradient head coil design offers improved performance and practical construction.
• This design addresses the limitations of conventional head coils in terms of space and accessibility.
• The findings suggest a more efficient and effective solution for high-resolution head MRI.