Shorter treatment times reduce the impact of intra-fractional motion : A real-time 4DUS study comparing VMAT vs. step-and-shoot IMRT for prostate cancer.
Hendrik BallhausenMinglun LiUte GanswindtClaus BelkaPublished in: Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] (2018)
The position of the prostate changed less during shorter fractions, limiting fraction-average and end-of-fraction variance. This substantially and significantly reduced the impact of intra-fractional motion during shorter VMAT fractions as compared to longer step-and-shoot IMRT fractions.