The CT ring shape lesions.
D000293:Adolescent; D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging*; D001922:Brain Abscess / Q000000981:diagnostic imaging; D001927:Brain Diseases / Q000000981:diagnostic imaging*; D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D002648:Child; D002675:Child, Preschool; D006406:Hematoma / Q000000981:diagnostic imaging; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000000981:diagnostic imaging; D011859:Radiography