Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is marked cardiomegaly ; given the morphology , a pericardial effusion could also be considered . Retrocardiac opacification is not specific , but probably includes a pleural effusion . Vague opacity in the right lower lung is not entirely specific but suggestive of fluid along the major fissure . The visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . Opacities at the left lower lobe , right lung base , and upper right lung , including probable pleural effusions . Commonly this type of appearance is due to atelectasis although pneumonia is possible . Opacification in the right lower lung is most suggestive primarily o pleural fluid . Parenchyma shows mild pulmonary venous hypertension . 2 . Given the morphology of the heart , the presence of a pericardial effusion could be considered .