Figure 4From: Image-based response assessment of liver metastases following stereotactic body radiotherapy with respiratory tracking Progressive lesion after SBRT; a liver metastasis with a calcified center before treatment (a), 2 months later (b) we observe the changes of the initial phase as described, 4 months (c) and 6 months later (d) CT slices show the Daisy Sign: a lobulated thick peripheral enhancement. Back to article page