title: The thoracic paraspinal shadow: normal appearances.
abstract: The width of the right and left thoracic paraspinal shadows were measured at all levels in 200 presumably normal individuals. The paraspinal shadow could be identified in nearly all cases on the left side and in approximately one-third on the right. The range of variation was greater on the left side than one the right. The left paraspinal shadow was wider at the upper levels and in individuals above 40 years of age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003238:Connective Tissue / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging*