passages.id: split_4_test_77_passage
passages.type: progene_text
passages.text: The global distributions of cranio - caudal ( CC ) , posterior - anterior ( PA ) and left - right ( LR ) shifts were considered ; for each patient random and systematic error components were assessed by following the procedure suggested by Bijhold et al. ( Bijhold J , Lebesque JV , Hart AAM , Vijlbrief RE. Maximising set - up accuracy using portal images as applied to a conformal boost technique for prostatic cancer. Radiother. Oncol. 1992 ; 24 : 261 - 271 ) .