SBRT2015

Tumor tracking: DMLC

“Using the MLC to track the tumour: breathing leaves ”

• Advantages : !

Using the available dynamic MLC

Using a “work horse” linac

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• Drawbacks : !

Only useable with a flattened beam, what with FFF? Tracking and DMLC intensity modulation are coupled: coupled constraints and increased complexity with higher modulation and higher velocities Tracking perpendicular to MLC leaf tracks? Leaf leakage?

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MLC

Static

Not-tracked

Tracked

5

SBRT 2015 - D. Verellen