title: Lung function imaging under quantitative spirometrically controlled CT.
abstract: OBJECTIVE
  To assess the possibility of using spirometrically controlled computed tomography (CT) to test pulmonary ventilation function.
  
  
  METHODS
  Spiral CT scans under the control of a spirometer were performed on 30 healthy adults. Spiral CT scan was performed at 50% vital capacity (VC) with an 8 mm slice thickness. Mean attenuation values and pixel index (PI) of lung regions were evaluated with semiautomatic evaluation software.
  
  
  RESULTS
  There were significant differences in PI values between four pixel intervals.
  
  
  CONCLUSIONS
  Spirometrically controlled spiral CT with semiautomatic evaluation software is an accurate and reproducible method of measuring lung density and PI, which has the possibility of indicating pulmonary ventilation function.
authors.affiliation: Postgraduate Department of Internal Medicine, General Hospital of Chinese People's Armed Police Forces, Beijing 100039, China.
authors.forename: Jinghong
authors.initials: J
authors.lastname: Xu
authors.forename: Ping
authors.initials: P
authors.lastname: Han
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.forename: Gansheng
authors.initials: G
authors.lastname: Feng
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Tian
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging* / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D012129:Respiratory Function Tests; D013147:Spirometry; D014057:Tomography, X-Ray Computed; D014797:Vital Capacity