Patient position reproducibility in fractionated stereotactic radiotherapy: an update after changing dental impression material.
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.
Rosenberg
I
I
Physics Department, the Royal Marsden NHS Trust, London, UK.
Alheit
H
H
Beardmore
C
C
Lee
K S
KS
Warrington
A P
AP
Brada
M
M
D000180:Acrylic Resins; D003760:Dental Impression Materials; D019583:Dose Fractionation, Radiation; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy; D011187:Posture; D015203:Reproducibility of Results; D013238:Stereotaxic Techniques / Q000295:instrumentation*
D000180:Acrylic Resins; D003760:Dental Impression Materials