Computed tomography of the pulmonary fissures: normal anatomy.

Thirty normal computed tomography (CT) examinations of the thorax have been reviewed in order to analyze the anatomy of the pulmonary fissures. The major and minor fissures are constantly visible, and their orientation with respect to the scanning plane appears either as a narrow fibrous line or as a hypovascular band. On both sides, the major and minor fissures are constantly in close contact with the pars interlobaris of the pulmonary arteries.