Perspective In the event that the study shows that DECT enhances the quality of the imaging staging of patients with RC, the consequences will be substantial. If the accuracy of lymph node positive for RC reaches 90%, a local resection would be possible for the 10% of the lymph nodes positive T1 tumors. Furthermore you may be able to offer local resection for the 75% of T2 and T3 early cancers that have not spread, and who otherwise meet the criterions for local resection. With secure node diagnostics, the surgical oncological treatment will improve in terms of prognosis and the rate of local relapse. Furthermore, one with better lymph node diagnostics one can avoid unnecessary neoadjuvant chemo-radiotherapy to the previous false-positive patients. They are between 25 and 50%.