Fig. 1.

Measured depth dose curves in a 100 m², 6 MV beam where (a) the point optical fibre system is placed at the isocentre of the beam (x = 0 mm) and (b) at the out of field (x = 60 mm, where average energy is ≈100 keV), with and without the RL films placed at the surface of the PMMA plates. Error bars, when visible, are the standard deviation of the measure (1SD). Upper plots presents the difference between the curves (with and without the presence of the film).