TI - Independent Six-degree-of-freedom Accuracy Evaluation of BrainLab ExacTrac Dynamic and Varian CBCT Systems in Stereotactic Radiotherapy Using a Couch-based Reference AU - YALMAN, D. AU - TAVLAYAN, E. AU - HAZERAL, Y.Z. AU - OLACAK, N. AU - KAMER, S. SO - Turk J Oncol 2026;41:018-027. DO - 10.5505/tjo.2025.4737