Physics Bucharest 2017

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When things go wrong-a lesson from history

OVER DOSAGE • Example brachial plexus neuropathy (BPN) due to radiation • Overlap of radiation fields as a result of change in position between treatment of chest wall and nodes • BPN developed in 75% • 100% with major move • 63% with moderate move

Moderate move between fields

UNDER DOSAGE • BPN due to disease recurrence

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