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Patient position reproducibility in fractionated stereotactic radiotherapy: an update after changing dental
I Rosenberg1, H Alheit, C Beardmore
1Physics Department, the Royal Marsden NHS Trust, London, UK.
Abstract:
The reproducibility of patient positioning within the Gill-Thomas-Cosman relocatable stereotactic frame was re-evaluated following the substitution of a new, softer, dental impression material for the original hard acrylic compound. The average total displacement for a series of 10 patients was 1.1 mm (+/- 0.6 mm). Rotational discrepancies were small. This technique cannot deliver accurate repositioning in the absence of patient co-operation.