Patent ID: 9694206
Date: 2017-07-04
CPC Classifications: A61N,G01R

Claim:
1. A radiotherapy system comprising: a patient support, moveable along a translation axis; an imaging apparatus, comprising a first magnetic coil and a second magnetic coil, the first and second magnetic coils having a common central axis parallel to the translation axis, and being displaced from one another along the central axis to form a gap therebetween, the imaging apparatus being configured to obtain an image of a patient on the patient support; a source of radiation mounted on a chassis, the chassis being rotatable about the central axis and the source being adapted to emit a beam of radiation through the gap along a beam axis that intersects with the central axis; a multi-leaf collimator comprising a plurality of movable elongate leaves; and a radiation detector mounted to the chassis opposite the source, the radiation detector having a plurality of detector elements arranged in columns, each of the columns being superimposed with a respective elongate leaf of the elongate leaves when the plurality of detector elements and the plurality of elongate leaves are projected onto an isocentric plane and wherein the pitch between columns is equal to a width of the elongate leaves when projected onto the isocentric plane.