Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided calcified aortic arch is again noted . The cardiomediastinal silhouette is otherwise unremarkable . The lungs are clear of focal consolidation . Increased interstitial markings throughout the lungs are noted not dramatically changed since priors . On the lateral view , there is increased density projecting over the left pleura posteriorly , potentially a loculated effusion or pleural - based soft tissue . Trace right - sided effusion is identified . No focal osseous abnormalities identified .
    OUTPUT:
    
1 . Increased interstitial markings in the lungs , not dramatically changed since prior . This could represent a chronic interstitial process although superimposed vascular congestion or atypical infection is possible . 2 . New pleural - based opacity seen posteriorly on the left could represent a loculated effusion . If this does not clear on short interval subsequent exams by x-ray , CT is advised .