Figure 2From: Intra-fraction setup variability: IR optical localization vs. X-ray imaging in a hypofractionated patient populationWorkflow of data acquisition and analysis. The 3D position of external surrogates was acquired before and after the irradiation. Patient was also imaged trough X-ray imaging before and after the treatment. Data were analyzed off line to measure the intra-fraction motion according to the two subsystem.Back to article page