Introduction: The use of hrct has an established role in the detection and in the differential diagnosis of interstitial lung diseases (ilds). In selected cases, a specific hrct pattern suffices for the presumptive diagnosis, even in the absence of histological confirmation. The major abnormality in ilds is disruption of the lung parenchyma. Objectives: To Determine Frequencies Of Different Radiological Patterns Of Interstitial Lung Diseases On Hrct. Study design: Cross-Sectional Survey. Setting: Department Of Diagnostic Radiology, King Edward Medical University/Mayo Hospital, Lahore. duration of study: Study Was Carried Out Over A Period Of Six Months From 16-05-2009 To 30-11-2009. subjects and methods: total 65 cases of interstitial lung diseases were included in this study. Hrct examinations were performed using 1.0- or 1.5 mm thick sections taken at 1 cm intervals throughout the entire lungs during inspiration in the supine position and through the caudal 10 cm of the lungs at 2–3 cm increments in the prone position. Results: the range of age was from 30 years to 70 years and mean age was 45.8±7.7 years. There were 23 (35.4%) males and 42 (64.6%) females. Hrct patterns were as follows: nodular 29 (44.6%), reticular 21 (32.3%) honeycombing 15 (23.1%). Conclusion: in this study, we have found out prevalence of different patterns of ild on hrct . Therefore, without surgical lung biopsy we can obtain prevalence of different disease on the basis of hrct.
