Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is subtle right basilar opacity which appears slightly increased as compared to the prior study . Findings could be due to atelectasis or aspiration ; however , underlying infection is not excluded . No evidence of pneumothorax is seen . There is mild blunting of the bilateral costophrenic angles which may be due to trace pleural effusions . The cardiac silhouette is top normal to mildly enlarged . The aorta is calcified . There may be mild central pulmonary vascular congestion .
    OUTPUT:
    
1 . Slight increase in right basilar opacity is non-specific but could be due to infection or aspiration in the appropriate clinical setting . 2 . Trace bilateral pleural effusions .