title: Three-dimensional computed tomography for assessing lung morphology in adolescent idiopathic scoliosis following posterior spinal fusion surgery.
abstract: OBJECTIVE
  To evaluate the changes in lung morphology in subjects with adolescent idiopathic scoliosis (AIS) following posterior spinal fusion surgery.
  
  
  METHODS
  From April 2009 to August 2013, 30 AIS patients (nine males and 21 females) were enrolled in this study. All scans were obtained with the patient in the supine position and the breath held in deep inspiration and performed both before and after surgery. Syngo software was used to manage the computed tomography scan imaging and to calculate the lung volume, lung height and pulmonary cross-sectional area in the apical vertebral plane.
  
  
  RESULTS
  Left lung, right lung and total lung volumes and convex to concave lung volume ratio did not change significantly after corrective surgery. There was a statistically significant improvement in left lung and right lung heights after posterior spinal fusion surgery. However, the pulmonary cross-sectional area in the apical vertebrae plane was smaller postoperatively than preoperatively.
  
  
  CONCLUSIONS
  This study showed that lung height in AIS patients increased significantly immediately postoperatively whereas lung volume did not change significantly. Thoracic symmetry was improved postoperatively in these patients.
authors.affiliation: Department of Orthopaedics, Chinese People's Liberation Army General Hospital, Beijing, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Fu
authors.forename: Chao
authors.initials: C
authors.lastname: Liu
authors.forename: Yong-gang
authors.initials: YG
authors.lastname: Zhang
authors.forename: Guo-quan
authors.initials: GQ
authors.lastname: Zheng
authors.forename: Guo-ying
authors.initials: GY
authors.lastname: Zhang
authors.forename: Kai
authors.initials: K
authors.lastname: Song
authors.forename: Xiang-yu
authors.initials: XY
authors.lastname: Tang
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008168:Lung / Q000000981:diagnostic imaging* / Q000473:pathology; D008176:Lung Volume Measurements; D008297:Male; D011184:Postoperative Period; D011446:Prospective Studies; D012600:Scoliosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D013123:Spinal Fusion / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods
keywords: Adolescent idiopathic scoliosis; Lung morphology; Pulmonary function; Thoracic symmetry; Three-dimensional computed tomography