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Published on: July 29, 2013
Quality control aspects of the Philips multileaf collimator
1North Western Medical Physics, Christie Hospital NHS Trust, Manchester, UK.
Summary
Implementing quality control (QC) for multileaf collimators (MLCs) on linear accelerators requires specific checks. The Philips MLC requires minimal additional QC time, ensuring its commissioning specifications are maintained.
Area of Science:
- Medical Physics
- Radiation Oncology
- Quality Assurance
Background:
- Multileaf collimators (MLCs) are increasingly common in linear accelerators.
- Preventative maintenance and quality control (QC) are essential for maintaining MLC commissioning specifications.
Purpose of the Study:
- To evaluate the design criteria of the Philips MLC for comprehensive QC.
- To identify specific QC challenges associated with MLCs.
Main Methods:
- Assessed MLC design criteria relevant to QC.
- Identified QC issues: leaf positional accuracy, leakage, X-ray/light field alignment, and gravity's influence.
- Discussed routine QC check methods for MLCs.
Main Results:
- The Philips MLC introduces new QC procedures.
- Only an additional 30 minutes of QC time per month is required for the Philips MLC.
- MLC implementation minimally impacted departmental downtime.
Conclusions:
- The Philips MLC is compatible with a robust QC program.
- Effective QC for MLCs ensures continued accuracy and reliability in radiotherapy.
- Minimal time investment is needed for comprehensive MLC quality control.
