When is chest CT scanning used in the evaluation of asthma symptoms?

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

High-resolution CT (HRCT) is a second-line examination. It is useful in patients with chronic or recurring symptoms and in those with possible complications such as allergic bronchopulmonary aspergillosis and bronchiectasis. [60] In the last decade, the role of CT in the imaging of airway disease increased after the development of lung HRCT. The technical progress of thin-section acquisition, high-spatial-frequency data reconstruction (ie, bone algorithm technique), and targeted reconstruction has allowed the visualization of finer details on HRCT scans; these details include airtrapping, measurable bronchial wall thickening, atelectasis, centrilobular nodules due to mucous plugging, and acinar nodules due to low-grade inflammatory changes. [61]


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