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This is the AI sumamry of MRI materials:

MRI machine coils—including main, gradient, and RF coils—are constructed primarily from conductive materials like
copper, niobium-titanium alloys, and aluminum. These materials are often wound, layered, and insulated with materials such as epoxy, resin, or Kapton to create the precise magnetic fields and antenna functions required for imaging.
Key Materials and Components:

Main Magnet (Bo) Coils: These are typically made of superconducting materials, most commonly niobium-titanium (
) cooled in liquid helium, though some designs may use high-temperature superconductors.
Gradient Coils: Usually constructed from thick copper sheets or wire, designed to create varying magnetic field strengths across the body.
Radiofrequency (RF) Coils: These antenna-like coils are often made of copper or silver-plated conductors, designed to send and receive signals. They can be flexible and use silicone materials, or in advanced research, liquid metals like gallium indium.
Support/Insulation: Materials such as epoxy resins, fiberglass, and Kapton are used to insulate and securely hold the conductive windings together.

Coil Types and Functions:

Main Coils: Create the primary strong, stable magnetic field.
Gradient Coils: Used to create spatial encoding of the MR signal, allowing the machine to locate where the signal originates.
RF Coils: Act as antennas to transmit and receive signals.

Modern developments are increasingly using lighter materials, flexible materials, and even 3D printing techniques to improve patient comfort and image resolution.