2017_SBRT_Course Book

Definition of the OAR spinal cord Conventional CT CT Myelography T2 weigted MRI

No consensus on planning organ at risk “spinal cord”: • Spinal cord • Spinal cord + 1-2mm • Thecal sack (cord + 0.5 – 1.5mm) • Spinal canal

Use a planning OARs with some margin

/ ESTRO SBRT 2017 - Matthias Guckenberger

07.09.17

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Dose and fractionation

Lovelock IJROBP 2009

Yamada IJROBP 2008

1 x 15.1Gy

1 x 24Gy

Ø Dose effect relationship in single fraction SRS

/ ESTRO SBRT 2017 - Matthias Guckenberger

07.09.17

28