Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left moderate pleural effusion and right minimal pleural effusion has increased since previous exam . There is no pulmonary edema . Cardiac contour is mildly enlarged and left lower lobe increased density could be due to the pleural effusion with compressive atelectasis ; however , superimposed aspiration or pneumonia can not be excluded .
    OUTPUT:
    
1 . Increase in moderate left pleural effusion and minimal right pleural effusion . There is no pulmonary edema . 2 . New left lower lung opacities could be a mix of pleural effusion and compressive atelectasis . A superimposed infection or aspiration can not be excluded in appropriate clinical setting .