Vertical field type MRI apparatus with a conical gradient coil situated in the main magnet

A vertical field-type MRT apparatus for forming magnetic resonance images, comprising:

• at least one field-generating superconducting coil system for producing a substantially homogeneous magnetic field in an imaging volume, said coil system including an outer coil arranged in a flat outer coil plane and a supplementary coil arranged within said outer coil and in said outer coil plane, said outer coil and said supplementary coil being energized to generate magnetic fields in opposite directions, a ratio Da/Do of a diameter Da of said supplementary coil to a diameter Do of said outer coil being between 0.7 and 0.9;
• and
• at least one gradient coil system for producing a magnetic gradient field in the imaging volume, said at least one gradient coil system including a flat main gradient coil and a shielding coil having an apex situated at a distance from said main gradient coil which is larger than a distance between an edge of said shielding coil and said main gradient coil, said at least one gradient coil system being situated at least partly in a space within said supplementary coil.