Fig. 7From: Image quality of 4D in-treatment CBCT acquired during lung SBRT using FFF beam: a phantom studyBox plots of the contrast-to-noise ratios calculated for the in-treatment 4D CBCT images obtained with 16 VMAT plans for 10 respiratory phases (0, 10, …, 90); 0 and 50 phases represent end-of-exhalation and end-of-inhalation phases, respectively, and the other phases represent intermediate phasesBack to article page