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Updated: Jul 16, 2026

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Application of an optical flow method to inspiratory and expiratory lung MDCT to assess regional air trapping: a
Drew A Torigian1, Warren B Gefter, John D Affuso
1Department 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
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.
Conclusion:
Qualitative and quantitative assessment of regional air trapping is feasible using an optical flow method to align volumetric MDCT data sets.
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