Figure 4From: Eight years of IMRT quality assurance with ionization chambers and film dosimetry: experience of the montpellier comprehensive cancer centerDose difference between measured and calculated dose for global patient verification. Results for 383 prostate cases (a) and 158 head and neck cases (b). Square dots represent verification with gantry angle at 0° and triangular dots with the gantry in the treatment position.Back to article page