Lateral Decubitus CT
A Useful Adjunct to Standard Inspiratory-Expiratory CT for the Detection of Air-Trapping
Tomas Franquet1,
Eric J. Stern2,
Ana Giménez1,
Josep Ma Sabaté1 and
Pere Domingo3
1
Department of Radiology, Hospital de Sant Pau, Universidad
Autónoma de Barcelona, Avda Sant Antoni
Ma Claret 167, Barcelona 08025, Spain.
2
Department of Radiology, Harborview Medical Center, University of Washington,
325 Ninth Ave., ZA-65 Seattle, WA 98104.
3
Department of Internal Medicine, Hospital de Sant Pau, Universidad
Autónoma de Barcelona, Barcelona 08025,
Spain.

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Fig. 1A. 58-year-old woman with bronchiolitis obliterans. High-resolution CT
scan obtained at suspended full inspiration shows dilated bronchioles with
associated wall thickening (arrow) and multiple mucoid impactions
(arrowheads).
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Fig. 1B. 58-year-old woman with bronchiolitis obliterans. Right lateral
decubitus CT scan at full suspended expiration shows better image quality than
A and reveals hyperlucent area in apical (asterisk) segment of
right lower lobe, consistent with air-trapping.
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Fig. 2A. 59-year-old woman with bronchiolitis obliterans, previous
mastectomy, and progressive dyspnea. High-resolution CT scan (2-mm section) at
full suspended expiration shows lobular areas of air-trapping
(arrows).
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Fig. 2B. 59-year-old woman with bronchiolitis obliterans, previous
mastectomy, and progressive dyspnea. Right lateral decubitus CT scan at full
suspended expiration shows clear view of lobular areas of air-trapping.
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Copyright © 2000 by the American Roentgen Ray Society.