The management of upper urinary tract stones needs an imaging for the diagnosis, the evaluation and the follow-up of the stones. The imaging has to be of good quality. For the simple acute flank pain, regular plain film with ultrasonography can be sufficient. For complex acute flank pain, a CT-scan with or without contract medium injection is mandatory. To plan the optimal treatment of the stone, injection of contrast medium is necessary if the diagnosis imaging is of poor quality. Imaging is systematically needed after the urological treatment of a stone. Regular plain film with ultrasonography is sufficient for the follow-up.