title: Short linear shadows connecting pulmonary segmental arteries to oblique fissures in volumetric thin-section CT images: comparing CT, micro-CT and histopathology.
abstract: OBJECTIVE
  To retrospectively evaluate short linear shadows connecting pulmonary segmental arteries to oblique fissures in thin-section CT images and determine their anatomical basis.
  
  
  METHODS
  CT scanning was performed on 108 patients and 11 lung specimens with no lung diseases around the oblique fissures or hila. Two radiologists evaluated the imaging. The parameters included length, thickness of short linear shadows, pulmonary segmental artery variations, and traction interlobar fissures, etc.
  
  
  RESULTS
  The short linear shadows were not related to sex, age, or smoking history. The lengths of the short linear shadows were generally within 10 mm. The thicknesses of the short linear shadows ranged from 1 to 2 mm. Of the patients, 26.9 % showed pulmonary segmental artery variations; 66.7 % of short linear shadows pulled oblique fissures. In three-dimensional images, the short linear shadows appeared as arc planes, with one side edge connected to the oblique fissure, one side edge connected to a pulmonary segmental artery. On the tissue slices, the short linear shadow exhibited a band structure composed of connective tissues, small blood vessels, and small lymphatic vessels.
  
  
  CONCLUSIONS
  Short linear shadows are a type of normal intrapulmonary membranes and can maintain the integrity of the oblique fissures and hilar structure.
  
  
  CONCLUSIONS
  • Volumetric thin-section CT scanning is commonly used to study lung anatomy. • Short linear shadows are a common intrapulmonary structure in thin-section CT. • Short linear shadows correlate with band structures on the correlative tissue slices.
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, 95 Yong'an Road, Xicheng District, Beijing, China.|Department of Radiology, Beijing Fengtai Hospital, 1 Xi'an Street, Fengtai District, Beijing, China.
authors.forename: Chun-Shuang
authors.initials: CS
authors.lastname: Guan
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, 95 Yong'an Road, Xicheng District, Beijing, China. madaqing00@163.com.
authors.forename: Da-Qing
authors.initials: DQ
authors.lastname: Ma
authors.affiliation: Department of Radiology, Beijing Fengtai Hospital, 1 Xi'an Street, Fengtai District, Beijing, China.
authors.forename: Dun
authors.initials: D
authors.lastname: Cui
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, 95 Yong'an Road, Xicheng District, Beijing, China.
authors.forename: Jiang-Hong
authors.initials: JH
authors.lastname: Chen
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, 95 Yong'an Road, Xicheng District, Beijing, China.
authors.forename: Bu-Dong
authors.initials: BD
authors.lastname: Chen
authors.affiliation: Department of Pathology, National Research Center for Occupational Safety and Health, 27 Shilong North Road, Mentougou District, Beijing, China.
authors.forename: Yan-Song
authors.initials: YS
authors.lastname: Zhang
authors.affiliation: Department of Pathology, Beijing Friendship Hospital,Capital Medical University, 95 Yong'an Road, Xicheng District, Beijing, China.
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008168:Lung / Q000000981:diagnostic imaging*; D008171:Lung Diseases / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging*; D012372:ROC Curve; D012189:Retrospective Studies; D036542:Tomography, Spiral Computed / Q000379:methods*; D055114:X-Ray Microtomography / Q000379:methods*; D055815:Young Adult
keywords: Anatomy; CT; Lung; Morphological variation; Pulmonary segmental artery