Some modalities assign the same SOP instance UID to images from different studies. When this occurs, these images are rejected. Therefore, operators of modalities should watch for rejections of images by the server and report such events to the PACS Administrator.
The system administrator should also regularly review log messages for rejections (for example, at least once a day, or more frequently when there is a high volume of incoming data). If any such events are found, the system administrator should notify the PACS Administrator.