iaea human health series publications - SEDIM

(6) If clinical images do not appear visually identical on the radiologist interpretation workstation, the monitorsmay need to be recalibrated. If recalibration fails to correct the problem, contact the monitor service person.(7) If the clinical image check reveals that the background is not black, that image contrast is inadequate, or thatthe brightness or contrast settings of the two monitors do not match, the source of the problem must beidentified and corrective action must be taken before any clinical examinations are interpreted from thereview workstation (see Fig. 22 for an example). A qualified service engineer may be needed to makebrightness and contrast adjustments on the radiologist workstation monitors and to recalibrate monitors.(8) All corrective actions should be recorded on the relevant monitor QC charts (Charts 5 and 6 in Annex I), asappropriate.(a)(b)FIG. 22. Unacceptable monitors: (a) significant differences are noted in the background blackness, brightness and contrast;(b) the monitor on the left has a maximum luminance 20% greater than that on the right.54