The solution involves interpreting the given CT image with the background information of allergic rhinitis. Allergic rhinitis can lead to sinus-related changes that may be visible on a CT scan. One common radiological feature associated with sinus conditions, such as those caused by allergic rhinitis, is the presence of 'double densities'. This appearance is typically due to the presence of fluid or sinus opacification superimposed on the underlying bone structure of the maxillary sinus. Therefore, the most appropriate identification for this image, considering the history of allergic rhinitis, would be 'Double densities'.