<prompt> Most likely diagnosis ?Interstitial lung diseasePulmonary aery hypeensionCongestive hea failureBronchiectasis  <response>: CT scan of chest showing enlarged pulmonary aeries In interstitial lung diseases HRCT shows bilateral subpleural reticular changes,with traction bronchiectasis and honeycombingidiopathic pulmonary fibrosis.and varies according to cause of ILD. In bronchiectasis CT shows: tram tracts and signet ring sign. 