Hi Everyone I need some openions on RAD-SURE irradiation indicator (15 Gy)validation. At my institution we use an expired unit and stick three indicators on the back of the bag, one on top, one on bottom and one in the middle. Photocopy before Irradiation showing the NOT visible. Photocopy the bah after the irradiation showing that the NOT is not visible any more. Is this how everybody else does it ?? Also what are the thought about using the front side of the bag which has Label on it. Would that be valid or not. I was told not to use the front side of the bag to validate the indicators. Is that a regulation. Where can I find more info. Also If someone would like to share their protocol I would appriciate it. Thanks