Modular gradient coil: A new concept in high-performance whole-body gradient coil design

Area of Science:

• Medical Imaging
• Magnetic Resonance Imaging Physics

Background:

• Gradient coils are essential components in Magnetic Resonance Imaging (MRI) systems, responsible for spatial encoding.
• Existing gradient coil designs face challenges in balancing performance, shielding, and patient safety, particularly concerning peripheral nerve stimulation (PNS).

Purpose of the Study:

• To introduce a new concept for high-performance Magnetic Resonance Imaging (MRI) gradient coil design, termed the Modular Gradient Coil (MGC).
• To develop an actively shielded, whole-body gradient coil capable of generating versatile gradient performance levels while preventing peripheral nerve stimulation.

Main Methods:

• The Modular Gradient Coil (MGC) integrates multiple independent elements onto a single former for generating gradient fields along the x, y, and z axes.
• Elements can be energized in various configurations using a single gradient power supply unit (PSU).
• Design criteria include specifying different volumes of gradient linearity for each operating mode to prohibit peripheral nerve stimulation.

Main Results:

• The MGC design provides actively shielded, whole-body gradient fields.
• The design allows for a range of gradient performance levels through different element energizing configurations.
• Peripheral nerve stimulation is prohibited across all operating modes by adjusting gradient linearity volumes.

Conclusions:

• The Modular Gradient Coil (MGC) represents a novel approach to MRI gradient coil design.
• This design achieves high performance and actively shielded gradient fields.
• The MGC effectively mitigates peripheral nerve stimulation, enhancing patient safety during MRI scans.