Fig. 6
From: Clinical utility of Gafchromic film in an MRI-guided linear accelerator
(a) 3%1 mm relative gamma evaluation between planned dose and measured film dose for a 4.98 × 4.98 cm2 open field showing a gamma pass rate of 99.1%. (b) X-Profile comparison between film (solid) and planned dose (dashed). The relative dose difference for each point along the profile is indicated by a red asterisk. (c) X-Profile comparison between film (solid) and IC Profiler dose (dashed). The relative dose difference at each IC Profiler chamber position is indicated by a red asterisk. The formula for the relative % dose difference for a point is 100 × (Di,measure × SF – Di,plan)/Dglobal,where Di,plan is the planned dose at point i, Di,measure is the measured dose at point i and SF is the relative scaling factor determined by comparing the maximum dose. Dglobal is the global reference dose (the max dose within the dose distribution)