title: Application of an optical flow method to inspiratory and expiratory lung MDCT to assess regional air trapping: a feasibility study.
abstract: OBJECTIVE
  We describe the application of an optical flow method to inspiratory and expiratory high-resolution volumetric lung MDCT for the assessment of regional air trapping.
  
  
  CONCLUSIONS
  Qualitative and quantitative assessment of regional air trapping is feasible using an optical flow method to align volumetric MDCT data sets.
authors.affiliation: Department of Radiology, University of Pennsylvania School of Medicine and Hospital of the University of Pennsylvania, 3400 Spruce St., Philadelphia, PA 19104-4283, USA. Drew.Torigian@uphs.upenn.edu
authors.forename: Drew A
authors.initials: DA
authors.lastname: Torigian
authors.forename: Warren B
authors.initials: WB
authors.lastname: Gefter
authors.forename: John D
authors.initials: JD
authors.lastname: Affuso
authors.forename: Kiarash
authors.initials: K
authors.lastname: Emami
authors.forename: Lawrence
authors.initials: L
authors.lastname: Dougherty
mesh_terms: D045853:Exhalation; D005240:Feasibility Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D001239:Inhalation; D008176:Lung Volume Measurements / Q000379:methods*; D055095:Optics and Photonics; D012123:Pulmonary Ventilation; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012126:Respiratory Dead Space; D012212:Rheology / Q000379:methods*; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D014057:Tomography, X-Ray Computed / Q000379:methods*