Correction of patient positioning errors based on in-line cone beam CTs: clinical implementation and first experiences

Background The purpose of the study was the clinical implementation of a kV cone beam CT (CBCT) for setup correction in radiotherapy. Patients and methods For evaluation of the setup correction workflow, six tumor patients (lung cancer, sacral chordoma, head-and-neck and paraspinal tumor, and two prostate cancer patients) were selected. All patients were treated with fractionated stereotactic radiotherapy, five of them with intensity modulated...