CT Quantitative Assessment of Interstitial Lung Disease

"CT chest in our institution will be done with standard high resolution protocol . No I.V contrast will be given. Scans will be obtained during full inspiration in supine position from the thoracic inlet to the level of the diaphragm.~Patients with CT chest performed outside our institution will be reviewed in DICOM format and assessed for its compatibility to be integrated into the computer-based analysis software."

Spirometry will be performed using standard techniques according to ATS-ERS criteria 2019 . Spirometry device (Zan 300, NSPIRE HEALTH GMBH Co.) will be used. Percentage predicted values (%pred) will be calculated based on reference values for healthy adults. All patients will be required to undergo spirometry in a reproducible way, and the best values will be reported. Spirometry should meet international acceptability and repeatability standards