ESTRO 2023 - Abstract Book

S611

Monday 15 May 2023

ESTRO 2023

Conclusion Intra-fractional movements of the target and OAR may result in risk of increased toxicity, and for some pts under-dosage of the target. To ensure the safe delivery of SRT to centrally located lung lesions, it is necessary to monitor and correct for the intra-fractional target shift of the treated pts. It may be necessary to acquire an additional CBCT mid-treatment, to reposition pts with observed large intra-fractional target shifts.

PD-0747 Topographical and chronological analysis of 2500 intrafraction SGRT records J. Torrès 1 , A. Korhonen 2 , I. Kulman 2,3

1 Kymenlaakso Central Hospital, Department of Medical Physics, Kotka, Finland; 2 Kymenlaakso Central Hospital, Department of Medical Physics , Kotka, Finland; 3 Tampere University, Department of Medical Physics , Tampere, Finland

Purpose or Objective