Application of active breathing control in 3-dimensional conformal radiation therapy for hepatocellular carcinoma: the feasibility and benefit.

Background And Purpose: To investigate the feasibility and effectiveness of utilizing active breathing coordinator (ABC) in 3DCRT for HCC.

Materials And Methods: A dosimetric comparison between the free-breathing (FB) plan and ABC plan in HCC 3DCRT was performed. Set-up errors and reproducibility of diaphragm position using ABC were measured, and patients' acceptance was also recorded.