Figure 1From: Eight years of IMRT quality assurance with ionization chambers and film dosimetry: experience of the montpellier comprehensive cancer centerVidar reading (ua) of an optical density wedge. (a) Reading of the OD step (b) Graph is plotted as a function of Optical Density for different digitalization table provide by the Vidar system. (Dark value is for logarithmic acquisition table, grey for PW5, and the light grey for linear table.)Back to article page