Which high-resolution CT (HRCT) findings are associated with a diagnosis of bronchial asthma?

Updated: Jan 07, 2019
  • Author: Michael J Morris, MD, FACP, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Answer

HRCT findings in bronchial asthma include the following:

  • Bronchial wall thickening

  • Bronchial dilatation

  • Cylindrical and varicose bronchiectasis

  • Reduced airway luminal area

  • Mucoid impaction of the bronchi

  • Centrilobular opacities, or bronchiolar impaction

  • Linear opacities

  • Airtrapping, as demonstrated or exacerbated with expiration

  • Mosaic lung attenuation, or focal and regional areas of decreased perfusions

Note the images below.

High-resolution CT scan of the thorax obtained dur High-resolution CT scan of the thorax obtained during inspiration demonstrates airtrapping in a patient with asthma. Inspiratory findings are normal.
High-resolution CT scan of the thorax obtained dur High-resolution CT scan of the thorax obtained during expiration demonstrates a mosaic pattern of lung attenuation in a patient with asthma. Lucent areas (arrows) represent areas of airtrapping (same patient as in the previous image).

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