Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate stable large right pleural effusion . Faint opacification in the left mid lung is not significantly changed since ___ and may represent an infectious process versus assymetric pulmonary edema . No left - sided pleural effusion identified . The mediastinal and hilar contours are normal . Moderate cardiomegaly is unchanged since ___ but increased compared to ___ .
    OUTPUT:
    
1 . Stable large right pleural effusion . 2 . Left mid lung opacification is unchanged since ___ , at which time it was new compared to ___ . Finding may represent infection versus assymetric pulmonary edema . 3 . Moderate cardiomegaly stable since ___ at which time it was new compared to ___ .