Table 1.
An overview of linac-based MRgRT approaches. The third column includes information on the field strength and orientation of the magnetic field relative to the radiation beam (perpendicular/inline)
| Company/institution | Commercial? | MRI and beam specification | Reference |
|---|---|---|---|
| ViewRay | Yes | 0.35 T split bore magnet, 6 MV beam (originally 60Co), perpendicular | [12] |
| Elekta | Yes | 1.5 T closed bore magnet, 7 MV beam, perpendicular | [13] |
| University of Alberta | Under development | 0.5 T biplanar magnet, 4 and 6 MV beams, inline/perpendicular | [14] |
| Australian MR-linac program | No | 1.0 T split bore magnet, 4 and 6 MV beams, inline/perpendicular | [15] |
| Siemens | No | 0.5 T closed bore magnet, 6 MV linac inside bore, perpendicular |
Patent no. US 8,958,864 B2 |
| Princess Margaret Hospital | No | Separated 1.5 T closed bore magnet on rails and a conventional multi-energy linear accelerator (offline MRgRT) | [16] |