Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since chest radiograph obtained 1 day prior , the left lung base is less well aerated . There is persistent mild pulmonary edema and pulmonary vascular congestion with a small right pleural effusion and a new , small left pleural effusion + / - adjacent atelectasis . Heart size is top - normal .
    OUTPUT:
    
Increased left basilar opacities may reflect increased left lower lobe atelectasis and pulmonary edema or alternatively a developing left lower lobe pneumonia .