New MLC generation for radiotherapy: drive concept leaves by using linear servo motor

The aim of radiation therapy is to eradicate a tumor without causing significant damage to contiguous normal tissue. For precise field shaping of the radiation beam multileaf collimators (MLC) have been broadly established. The linear servo MLC presented here provides various advantages over conventionally employed MLCs like reduced size and weight, dynamic leaf movements up to 4 m/s, direct fixation of the linear servo rod to the associated leaf and position sensors are implemented in the linear drives.

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