Fig. 4
From: Intra-fraction motion of the prostate is not increased by patient couch shifts
Intra-fraction motion of the prostate did not increase during couch shifts and even somewhat decreased after. The amount of intra-fraction motion is here shown as the standard deviation of prostate position. It was calculated for each 1 min before, centered around, and after couch shifts. It’s average value of 0.26 mm before couch shifts did not significantly increase during couch shifts to 0.27 mm (+3 %, p = 0.88). After couch shifts, motility seemed to somewhat decrease, in fact