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Summary of the 2D root-mean-square tracking errors for the ten lung tumour motion traces measured using cine MV images during the (a) arc and (b) static 5-field beam delivery without (no tracking) and with (tracking) real-time localisation. DMLC tracking integrated with the proposed localisation method showed ~1mm of mean root-mean square error irrelevant of the beam delivery modes or the range of motion.
