The evidence provided by medical imaging techniques for the staging and follow-up is relevant in oncology. Objectives: The aims were (i) to compare the monitoring methods, (ii) to analyze the response variability between different tumors, and (iii) to decipher a general response curve that is independent of tumor type and drug treatment. Methods: We analyzed the response variability in four cancer types, looking for a general response curve independent of the tumor type and drug treatment.
