Research Masterclass in Radiotherapy Physics 2017

A compact microbeam source Why do we use synchrotron radiation?

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For microbeams we require 1. Parallel beams

- To preserve sharp dose gradients - To guarantee high output factors

2.

Photon energy of around 100 keV - Otherwise electron scattering will cause large beam penumbras

3. High dose rates - To avoid dose blurring by organ motion in the micrometre range

Synchrotron radiation is characterised by a high beam brilliance, defined as