Figure 13
(a) Two-dimensional dose distributions evaluated with an EBT3 radiochromic film in a 14 cm-diameter PMMA phantom and (b) corresponding surface plots of percentage of maximum dose: two off-center foci (left side) and line distribution (right side). The intended dose distribution was obtained with multiple rotations. (c) For ease of visualization of the sample geometry, photograph taken during the placement of one-half of the cylindrical phantom on the rotation stage, where the piece of EBT3 film is visible at the mid-plane in the PMMA phantom. Above the film the longitudinal half cavity realized for hosting the ion chamber is visible, along the vertical axis of the cylindrical phantom. |