Headneck
♦ Useful for positive neck nodes in head/neck cancer
♦ Photon beams used to irradiate entire region including spinal cord
♦ Electron beams used additionally, except for spinal cord
- Depth (cm)
Tissue penetration of different types of radiotherapy beams.
A schematic representation of a typical electron beam collimation system (some components are not shown).
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