ESTRO 2021 Abstract Book

S696

ESTRO 2021

Results The respiratory amplitudes for all patients and fractions, in each direction, are plotted in fig. 1. The minimum and maximum baseline drifts are plotted in fig. 2. The mean (SD) respiratory amplitudes were 4.2 (1.9) mm CC C , 3.9 (1.7) mm CC S , 2.3 (1.1) mm AP and 1.4 (0.6) mm LR, with low variability within patients. The mean (SD) maximum baseline drifts were 1.2 (1.1) mm CC C , 1.2 (1.0) mm CC S, 0.5 (0.4) mm AP and 0.5 (0.3) mm LR. The mean (SD) minimum baseline drifts were -0.7 (0.5) mm CC C , -0.7 (0.5) mm CC S , -0.6 (0.5) mm AP and -0.5 (0.4) mm LR. The wearing of the corset was associated with some inconveniences but none of the patients reported pain or other discomfort that urged loosening the corset.