US 12,233,284 B2
SRS contoured multi-layer multileaf collimator
Ross B Hannibal, Saratoga, CA (US); Paul Baturin, Santa Clara, CA (US); and David Schaal, Sunnyvale, CA (US)
Assigned to VARIAN MEDICAL SYSTEMS, INC., Palo Alto, CA (US)
Filed by Varian Medical Systems, Inc., Palo Alto, CA (US)
Filed on Mar. 8, 2021, as Appl. No. 17/195,492.
Prior Publication US 2022/0280812 A1, Sep. 8, 2022
Int. Cl. A61N 5/10 (2006.01); A61B 90/10 (2016.01); G21K 1/04 (2006.01)
CPC A61N 5/1045 (2013.01) [A61N 5/1084 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first multileaf collimator including a plurality of pairs of beam-blocking leaves each including an end portion, wherein
the end portions of a pair of beam-blocking leaves, of the plurality of pairs, are contoured to allow forming a first aperture when the beam-blocking leaves of the pair are closed,
the end portions of each leaf of the pair of beam-locking leaves include an end surface extending a height of the beam-blocking leaves of the pair of beam-locking leaves,
the end surface of each leaf includes a first rounded section, a second rounded section, and a third section between the first rounded section and the second rounded section, and
the third section includes a concave surface portion forming the first aperture when the pair of beam-locking leaves are closed.