Non contrast ct is investigation of choice for

16 (D) (Interstitial lung disease) (707- Davidson 22nd)High resolution CT is superior to the plain chest x ray for early defection and confirmation of suspected ILD (2163-H 18TH).Clinical assessment including chest x-ray, pulmonary function test, haematology, biochemical andimmunological investigations | High -resolution CT||| |Appearances consistent with usual interstitial pneumonia Inconsistent clinical or CT appearances Appearances consistent with another diffuse parenchymal lung disease e,g, sarcoid| | |Diagnose idiopathic pulmonary fibrosis Further investigations, e,g, bronchoalveolar lavage, transbronchial biopsy, surgical biopsy Diagnose and treat accordinglyAlgorithm for the investigation of patients with interstitial lung disease following initial clinical and chest X-ray examination.