MLC leaf sequencing
Process of converting fluence maps into deliverable multileaf collimator positions for IMRT treatment.
Full Definition
MLC leaf sequencing is a critical step in intensity-modulated radiation therapy treatment planning that converts optimized fluence maps into executable multileaf collimator leaf positions and monitor unit calculations. This complex algorithmic process must account for mechanical constraints such as maximum leaf speed, interleaf leakage, and delivery time limitations while maintaining dose distribution accuracy. The leaf sequencing algorithm determines the specific sequence of MLC positions and monitor unit deliveries required to achieve the planned dose distribution during treatment delivery.
Usage
Usage note: Typically written as three separate words; avoid hyphenation.
In Context
- "MLC leaf sequencing converted the optimized plan into deliverable treatment segments." — Treatment planning workflow documentation
- "The leaf sequencing algorithm minimized delivery time while maintaining plan quality." — Physics optimization report