Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate well expanded lungs . There are no rib fractures identified on this exam . There is slight left basilar atelectasis and a small left pleural effusion noted . A tube is seen overlying the heart shadow , presumably related to recent pericardiocentesis . The heart silhouette is large but there are no signs of vascular congestion . There is no pneumothorax seen on this exam . Mediastinum is unremarkable .
    OUTPUT:
    
No rib fractures seen . Small left pleural effusion .