IGRT 2016 Madrid

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Intra-cranial stereotactic radiotherapy

Doses and margins in cranial SRS Traditional frame-based SRS: 0mm margins Minimum dose 13Gy  EXCELLENT local control & low Tox.  Delivered dose probably lower

Image-guided SRS: Uncertainties similar to frame-based SRS  Should we add margins?  Should we prescribe lower doses if margins are used?

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