New, “Super-Open,” MRI, and MRT Magnets

We have designed and optimized the uniform-field magnet system of two dozen, one-meter-bore, one-tesla, MRI, and Magnetic Resonance Therapy (MRT) systems with a minimum axial gap between the coils of one meter. These magnet systems include not only mirror-symmetric systems, but also ergonomic, non-mirror-symmetric systems. These super-open systems are ideal for MRI-guided surgery and image-guided radiotherapy, as well as for diagnosis, particularly if the patient suffers from claustrophobia. By iterating between three computer programs, one can also design optimum uniform-field magnet systems that include permanent magnets and/or magnetizable iron.