US 11,697,030 B2
Delivering independent 2D sub-beam intensity patterns from moving radiation source
Eric Schnarr, McFarland, WI (US); Robert O'Connell, Madison, WI (US); Richard Nash, Allison Park, PA (US); Matthew Orton, Oregon, WI (US); and Jacob Shea, Madison, WI (US)
Assigned to Accuray Incorporated, Sunnyvale, CA (US)
Filed by Accuray Incorporated, Sunnyvale, CA (US)
Filed on Jul. 17, 2020, as Appl. No. 16/932,464.
Application 16/932,464 is a continuation of application No. 16/055,507, filed on Aug. 6, 2018.
Prior Publication US 2020/0346038 A1, Nov. 5, 2020
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1047 (2013.01) [A61N 5/1081 (2013.01); A61N 5/1083 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a radiation treatment system, comprising:
modulating, by a processing device, a sub-beam intensity of a radiation beam generated by a radiation source across a plurality of sub-beams that subdivide a fluence field into a two dimensional (2D) grid, wherein modulating the sub-beam intensity is based on an open-time profile determined for each sub-beam of the plurality of sub-beams of the 2D grid positioned across an entire direction of travel for each of a plurality of leaf pairs; and
delivering a plurality of independently generated two-dimensional (2D) sub-beam intensity patterns from a plurality of angles while the radiation source is moved continuously based on the open-time profile, wherein a leaf motion profile associated with the open-time profile provides the sub-beam intensity pattern for each of the 2D sub-beam intensity patterns within a single discrete positional section associated with an angle of the plurality of angles for providing the corresponding 2D sub-beam intensity pattern, and wherein the open-time for each sub-beam of each 2D sub-beam intensity pattern is adjusted to provide a total leaf open-time for each of the plurality of leaf pairs that is less than a discrete time interval corresponding to a time for the radiation source to traverse the single discrete positional section associated with the angle of the plurality of angles.