Step Height .250″
Step Width .750″
Step Wedge Length 3.000″
Step wedges are used for the calibration of x-ray machines and evaluation of techniques. Also, when an object with various thicknesses is radiographed, a step wedge of the same material incorporating those thicknesses may often be advantageously used. By placing an IQI on each step and including the step wedge in the radiograph, the sensitivity may be suitably determined for each thickness.
Standard step wedges are, 1″ high and 2″ or 2 1/4″ wide, with 4, 8, or 16 steps.