Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion or pneumothorax . Diffuse bilateral interstitial markings along with the presence of Kerley B lines suggests interstitial pulmonary edema . There is a 4 x 4 mm dense opacity at the left lung base projecting over the left 8th rib , which may represent a calcified granuloma or a bone island . Heart size is top normal . No free air under the diaphragm .
    OUTPUT:
    
1 . Prominent bilateral interstitial markings compatible with interstitial pulmonary edema . 2 . 4 mm opacity projecting over the left 8th rib , which may represent a calcified granuloma vs bone island .