Repetitive SSTR-PET imaging for assessment of treatment response. Response to therapy assessed using repetitive SSTR-PET imaging. Patient no. 22 presented with a large primary tumor with satellite metastases (A). The primary tumor showed increased 68Ga-DOTATOC uptake (B, C). After combined radio-chemotherapy including liposomal doxorubicin (D), SSTR-expression was no longer detectable by SSTR-PET (E, F).