Related Experiment Videos
A monitor unit "odometer" for measuring linac workload
M D Evans1, J J Larkin, P Léger
1Medical Physics, McGill University Health Center Montreal, QC, Canada. mevans@medphys.mcgill.ca
Medical Physics
|January 19, 2002
Summary
A new Monitor Unit "odometer" accurately tracks linear accelerator (linac) workloads. This device automatically records total monitor units (MUs) delivered, improving regulatory compliance assessments.
Area of Science:
- Medical Physics
- Radiation Oncology
Background:
- Regulatory agencies require annual linear accelerator (linac) workload assessments for license compliance.
- Current methods for estimating linac monitor units (MUs) have inherent inaccuracies.
Purpose of the Study:
- To develop and evaluate an automated system for accurately measuring clinical linac MU workloads.
- To provide precise data for regulatory compliance and machine commissioning.
Main Methods:
- An integrating Monitor Unit "odometer" was designed to automatically accumulate MUs delivered by a linac.
- The device segregates total MUs by treatment mode (photon/electron) and energy.
- The system was deployed on a clinical linac for 10 months and during the acceptance testing of a new dual-energy linac.
Main Results:
- The "odometer" successfully recorded clinical linac MU workloads over a 10-month period.
- The device was integrated during the acceptance and commissioning of a new dual-energy linac, demonstrating its utility in critical phases.
Conclusions:
- The developed integrating MU odometer provides an accurate and automated method for assessing linac workloads.
- This technology enhances regulatory compliance and offers valuable data for machine acceptance and commissioning processes.