X-ray examinations can lead to an increase in the radiation dose a patient receives. In order to minimize this risk as much as possible Quality Assurance in Film Processing is defined in IEC 61223-2-1 and DIN 6868-2 resp. DIN V 6868-55 and International Standard IEC 61223-2-1.

In order to ensure a constant high level of film processing quality, a daily performance check of the film processor is required.

This Sensitometer Unilight S is used to expose a grey wedge with 21 steps on a test strip of the X-ray film. After developing the film, Densitometer Unilight D will be used to measure the density of various grades of the grey step wedge.