Patent ID: 11951330
Assignee: VARIAN MEDICAL SYSTEMS, INC.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. An apparatus, comprising:
a first multileaf collimator including a first plurality of pairs of first beam-blocking leaves each including an end surface, wherein the end surfaces of first beam-blocking leaves of two adjacent pairs have a first concave surface portion configured to collectively form an aperture when the two adjacent pairs of beam-blocking leaves are closed, and the end surfaces of first beam-blocking leaves other than the two adjacent pairs are chamfer leaves have a combination of a first convex surface portion and a first beveled flat surface portion at either side of the first convex surface portion; and
a second multileaf collimator including a second plurality of pairs of second beam-blocking leaves, the second beam-blocking leaves of the second multileaf collimator including chamfer leaves having a combination of a second convex surface portion and a second beveled flat surface portion at either side of the second convex surface portion.