Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Apart from mild bibasilar atelectasis , the lungs are clear without focal consolidation . There may be trace bilateral pleural effusions noted posteriorly on the lateral view . No pneumothorax is identified . Moderate degenerative changes of the thoracic spine are re - demonstrated .
    OUTPUT:
    
Moderate cardiomegaly with bibasilar atelectasis , but no pulmonary edema . Possible trace bilateral pleural effusions .