Evaluation of the Reproducibility of the Automated Measurement of the Extent of ILD on Chest CT

In interstitial lung disease (ILD), the extent of ILD on chest computed tomography (CT) is recognized as an important prognostic factor. Automated tools are now available to quantify ILD, but there is a lack of data on the reproducibility of this measurement and therefore its accuracy. Therefore, the purpose of this study is to evaluate the variability of automated ILD quantification on chest CT. Reproducibility will be assessed by repeating chest CT scans and using different tools to measure the extent of disease.

Inclusion Criteria: * Age ≥ 18 years * Known interstitial lung disease as part of idiopathic pulmonary fibrosis or connective tissue disease * Followed in one of the participating hospitals * Requiring a chest CT as part of a scheduled assessment * Affiliated to a French national social security * Informed consent Exclusion Criteria: * Acute exacerbation of ILD * Pregnancy * Inability to hold an apnea for 10 seconds * Patients in the exclusion period after a previous research * Need for additional procubitus or expiratory images