US 12,150,235 B2
Treatment planning
James Cooley, Andover, MA (US); Gerrit Townsend Zwart, Durham, NH (US); Stanley J. Rosenthal, Wayland, MA (US); Mark R. Jones, Reading, MA (US); Lionel G. Bouchet, Framingham, MA (US); Robert Cessac, Littleton, MA (US); and Joseph Jachinowski, Littleton, MA (US)
Assigned to Mevion Medical Systems, Inc., Littleton, CO (US)
Filed by Mevion Medical Systems, Inc., Littleton, MA (US)
Filed on Feb. 12, 2021, as Appl. No. 17/174,986.
Application 17/174,986 is a continuation of application No. 15/643,865, filed on Jul. 7, 2017, granted, now 10,925,147.
Claims priority of provisional application 62/360,227, filed on Jul. 8, 2016.
Prior Publication US 2021/0274635 A1, Sep. 2, 2021
Int. Cl. A61N 5/10 (2006.01); A61B 5/00 (2006.01); H05H 7/00 (2006.01); H05H 7/04 (2006.01); H05H 13/02 (2006.01)
CPC H05H 13/02 (2013.01) [A61B 5/0036 (2018.08); A61N 5/103 (2013.01); A61N 5/1036 (2013.01); A61N 5/1037 (2013.01); A61N 5/1045 (2013.01); A61N 5/1065 (2013.01); A61N 5/1077 (2013.01); H05H 7/04 (2013.01); A61N 2005/1087 (2013.01); A61N 2005/1094 (2013.01); A61N 2005/1095 (2013.01); H05H 2007/002 (2013.01); H05H 2007/007 (2013.01); H05H 2007/043 (2013.01); H05H 2007/045 (2013.01); H05H 2277/10 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method comprising:
storing, in computer memory, a library containing first information defining (a) positions of sets of parallel leaves of a configurable collimator that are extendible and retractable in a dimension to produce trimmed spots of a particle beam and (b) a configuration of carriages on the configurable collimator, the positions of the leaves being based on which of the leaves are extended and which of leaves are extracted;
receiving, from a treatment planning process, second information comprising a dose distribution for an area of an irradiation target to be treated using the particle beam;
obtaining a coarse beam spot set based on a minimum dosage of the particle beam and a maximum dosage of the particle beam, the coarse beam spot set comprising representations of spots of the particle beam that approximate a target dose of the particle beam to be applied to the area of the irradiation target to be treated using the particle beam, the minimum dosage comprising a minimum dosage to be applied to the area, and the maximum dosage comprising a maximum dosage to be applied outside of the area;
changing the spots in the coarse beam spot set to more closely approximate the dose distribution of the particle beam;
retrieving at least some of the first information from the library based on the changed spots in the coarse spot beam set;
moving the configurable collimator to the area; and
configuring the leaves and at least one of the carriages in the area based on the retrieved first information to trim the particle beam;
wherein the carriages comprise:
a primary carriage coupled to the leaves to move the leaves relative to the irradiation target in a first dimension relative to the irradiation target that is different from the dimension in which the leaves are extendible and retractable; and
secondary carriages coupled to the primary carriage and to the leaves to move the leaves in a second dimension relative to the irradiation target, the second dimension being the dimension in which the leaves are extendible and retractable.