1. A method for checking the presentation quality of an imaging system for medical diagnostics with respect to ring artifacts, said method comprising the following steps: creating at least one test image; defining concentric circles in the at least one test image, wherein the definition of the concentric circles in the at least one test image occurs around a rotational center which is fixed in the test image by the imaging system for medical diagnostics used; averaging the test image points, arranged on the respective circumferential lines of the circles in circumferential direction of a respective circle, to generate a ring profile; detecting ring artifacts in the generated ring profile; comparing the detected ring artifacts to a pre-selected criterion for evaluating a visual detectability of the detected ring artifacts, wherein the comparison includes computing visual signal noise for each ring artifact and comparing the computed signal noise to the pre-selected criterion.