US 12,239,852 B2
Motion synchronized arc radiotherapy
Steven Thomas, Vancouver (CA); Kirpal Kohli, Surrey (CA); and Justin Jeremy Jeun-Ming Poon, Vancouver (CA)
Assigned to Steven Thomas, et al., Vancouver (CA)
Appl. No. 17/309,457
Filed by PROVINCIAL HEALTH SERVICES AUTHORITY, Vancouver (CA)
PCT Filed Nov. 28, 2019, PCT No. PCT/CA2019/051707
§ 371(c)(1), (2) Date May 27, 2021,
PCT Pub. No. WO2020/107121, PCT Pub. Date Jun. 4, 2020.
Claims priority of provisional application 62/772,276, filed on Nov. 28, 2018.
Claims priority of provisional application 62/839,854, filed on Apr. 29, 2019.
Prior Publication US 2021/0370097 A1, Dec. 2, 2021
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1068 (2013.01) [A61N 5/103 (2013.01); A61N 5/1037 (2013.01); A61N 5/1045 (2013.01); A61N 5/1047 (2013.01); A61N 5/1049 (2013.01); A61N 5/1065 (2013.01); A61N 5/1081 (2013.01); A61N 2005/1055 (2013.01); A61N 2005/1061 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus for delivering a radiation treatment to a patient, the apparatus comprising:
a radiation source;
a drive connected to move the radiation source along a trajectory relative to the patient;
a memory having stored therein a radiation treatment plan specifying a plurality of beam ON segments of the trajectory and specifying a plurality of beam OFF portions of the trajectory interleaved with the plurality of beam ON segments of the trajectory;
a patient monitoring system connected to monitor a cardiac cycle of the patient, wherein the cardiac cycle includes quiescent periods;
one or more data processors connected to:
control the drive to advance the radiation source along the trajectory;
control the radiation source to deliver radiation in each of the plurality of beam ON segments of the trajectory and to deliver no or negligible radiation in each of the plurality of beam OFF portions of the trajectory;
process an output of the patient monitoring system to estimate a time for a next one of the quiescent periods of the cardiac cycle; and
control a speed at which the radiation source is advanced along the trajectory to cause a next one of the plurality of beam ON segments to coincide with the next one of the quiescent periods of the cardiac cycle.