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Delivery systems of intensity-modulated radiotherapy using conventional multileaf collimators
1Department of Radiation Oncology, University of California at San Francisco, USA.
Summary
Intensity-modulated radiotherapy (IMRT) is practical with multileaf collimators (MLCs), but requires careful consideration of MLC characteristics and delivery systems for safe and efficient implementation in clinics.
Area of Science:
- Medical Physics
- Radiation Oncology
Background:
- Intensity-modulated radiotherapy (IMRT) is a widely adopted radiation therapy technique.
- Multileaf collimators (MLCs) are crucial components for IMRT delivery.
- Understanding MLC characteristics is vital for safe and efficient IMRT implementation.
Purpose of the Study:
- To review major manufactured MLC collimators used in IMRT.
- To describe MLC characteristics, delivery mechanisms, and associated systems.
- To discuss quality assurance aspects of MLC-based IMRT.
Main Methods:
- Review of 3 major manufactured MLC collimators.
- Analysis of MLC physical characteristics, leaf movement, and field size limitations.
- Description of static and dynamic MLC delivery mechanisms and systems.
- Discussion of machine and patient plan quality assurance.
Main Results:
- Detailed descriptions of 3 MLC collimators, including their focusing type, leaf geometry, and movement constraints.
- Evaluation of MLC capabilities for IMRT field generation.
- Identification of quality assurance challenges in MLC-based IMRT.
Conclusions:
- MLC-based IMRT delivery is feasible in clinical settings.
- Thorough understanding and extensive preparation are necessary for successful clinical implementation of IMRT.
- Further efforts are required to optimize MLC performance and quality assurance protocols for IMRT.