Abstract: In a PACS environment, an overview of patient's history made up of a potentially large number of digital images is displayed as a two-dimensional array of thumbnails sorted by date in a one direction and anatomical feature in a second direction. From this very simple two-dimensional ordering of thumbnail images it is possible to appreciate an amazingly large amount about the patient's history. The information is deduced in a fully intuitive simple fashion, without having to study any patient history notes. The intuitive understanding of the patient's history comes in part from the special layout of the thumbnails which gives the user information on what images were taken at what time, in part from the fact that the user can see some major features of the image content in the thumbnails, and in further part because the user is able to intuitively combine the thumbnail layout and image content information.