ESTRO course on Image Guided Radiotherapy in Clinical Practice 2018

Intra-cranial stereotactic radiotherapy

Doses and margins in cranial SRS

Traditional frame-based SRS:

0mm margins

Minimum dose 13Gy

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EXCELLENT local control & low Tox.

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Delivered dose probably lower

Image-guided SRS:

Uncertainties similar to frame-based SRS

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Should we add margins?

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Should we prescribe lower doses if

margins are used?