Figure 3
From: A high-resolution large-area detector for quality assurance in radiotherapy

Spatial resolution. (a) Line pair mask type 17 made of 0.02 mm thick lead used as an imaging target. (b) Heat map of the TFT readout after irradiation with 30 kV X-rays. (c) Measured MTF with mask type 17 for the GEM-TFT detector.