Fig. 1From: The SBRT database initiative of the German Society for Radiation Oncology (DEGRO): patterns of care and outcome analysis of stereotactic body radiotherapy (SBRT) for liver oligometastases in 474 patients with 623 metastasesa Cumulative number of centers practicing liver SBRT and number of treated lesions from 1997 to 2014. b Change of prescribed biologically effective dose (BED) for SBRT liver oligometastases from 1997 to 2014Back to article page