Globally optimal, minimum stored energy, double-doughnut superconducting magnets

Area of Science:

• Medical Imaging
• Applied Superconductivity
• Magnet Design

Background:

• Designing superconducting magnets for interventional MRI presents challenges in achieving strong magnetic fields over large volumes.
• Previous double-doughnut magnet designs were limited in spatial resolution, signal-to-noise ratio, and field of view.

Purpose of the Study:

• To develop an advanced methodology for designing open symmetric superconducting magnets for interventional MRI systems.
• To overcome limitations of previous designs by optimizing coil arrangement for enhanced magnetic field strength and imaging volume.

Main Methods:

• Further development of the minimum stored energy current density map-based methodology.
• Application of the technique to design open symmetric magnets in a double-doughnut configuration.
• Simulation of 1-T double-doughnut magnets with specific field of view and gap parameters.

Main Results:

• The optimized coil arrangement maximizes field strength within the imaging region.
• The design yields open, dual-domain magnets with improved field strength compared to prior designs.
• An increased field-of-view volume was achieved, with simulations showing a 50-cm 1-ppm field of view.

Conclusions:

• The enhanced design methodology enables the creation of high-performance open superconducting magnets for interventional MRI.
• This approach addresses previous limitations, offering superior magnetic field generation and imaging capabilities.
• The developed magnets provide greater field strengths and expanded field-of-view volumes suitable for advanced interventional procedures.