ABSTRACT
Two-dimensional (2D) detectors are of great importance for megavoltage photon radiation therapy because they provide dosimetric data that are closely correlated to the https://www.w3.org/1998/Math/MathML"> 2 D https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315372655/b2ce6ef4-5376-4be5-9af3-87940a039f56/content/eq1683.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> fluence of the incident beams. These detectors can be used to measure basic characteristics of beams such as symmetry, flatness, positions and speeds of multileaf collimator (MLC) leaves, dose output of irregular fields, or to assess the quality of treatment plans through comparative analysis of dose maps [1–4]. They therefore play a role in a wide range of situations, including the commissioning of treatment-planning systems, the periodic quality assurances (QAs) of treatment machines, and the patient-specific QAs.
