A multi‐institution performance assessment of a double‐layer MLC
Andy Buckle, Conor Heeney, Matthew Jones, Vasu Ganesan, Ronan Valentine, Philip Wheeler, James Earley, Garry Grogan, Matthew Sparks
TL;DR
This study evaluates the performance of a new double-layer MLC used in Varian Halcyon and Ethos linacs across multiple institutions.
Contribution
The study establishes typical performance ranges for the MLC and identifies a specific calibration issue.
Findings
MLC performance indices are consistent with other linacs except for proximal layer calibration.
Automated image analysis enabled reproducible performance assessment across 16 linacs.
Typical ranges for Halcyon/Ethos MLC performance were successfully established.
Abstract
Varian Halcyon and Ethos linacs use a novel double‐layer MLC. To perform a multi‐institutional characterization of MLC performance of Varian Halcyon and Ethos linacs and establish the range of typical performance indices. The tests used plans delivered to the megavoltage (MV) imaging panel that can be easily implemented and reproducibly delivered in different centers. Automated image analysis was used to obtain metrics that characterize the MLC performance. The tests included picket fence, MLC leakage, sweeping gap, open field symmetry changes, change of output with gantry angle, and volumetric modulated arc therapy (VMAT) indices. Sixteen linacs from 11 centers were included in the study. Performance indices were found that are in line with other linacs, with the exception of proximal layer positional calibration. Typical ranges have been established for Halcyon/Ethos MLC…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsParallel Computing and Optimization Techniques · Transition Metal Oxide Nanomaterials · Advanced Data Compression Techniques