Fig. 4
From: Clinical utility of Gafchromic film in an MRI-guided linear accelerator
SEM images from open field acquisition in the coronal (a) and sagittal orientation (b). The Gafchromic films and orientation of the SEM images are shown in (i), SEM samples were acquired along the x and y axes of the films. The central sample is shown in (ii), and the most peripheral samples are shown in iii–vi images for both the coronal and sagittal films. The orientation of the polymer rods does not change as a function of location on the film