Patent ID: 9155913
Filing Date: 2015-10-13
Classification: A61B,A61N

Abstract:
1. An MRI-linac apparatus, comprising: a. an MRI scanner, wherein the MRI scanner comprises an open bore MRI magnet that is capable of generating a magnetic field having a fringe field, wherein said open bore MRI magnet comprises a doughnut-shape magnet, wherein said doughnut-shape comprises a center open bore that is symmetric to said doughnut-shape, wherein said center open bore comprises a cylindrical shape having a center axis, wherein said center axis of said center open bore is an axis of symmetry for said open bore MRI magnet; and b. a magnetically unshielded linac comprising an electron gun, wherein the electron gun is disposed to generate an electron beam in the presence of the fringe field, wherein the magnetically unshielded linac is displaced away from said axis of symmetry of said open bore MRI magnet, wherein the displaced magnetically unshielded linac is disposed to output a treatment beam that is displaced from an isocenter of said MRI-linac apparatus.