Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits and unchanged . The aorta is slightly tortuous . The lung volumes are low , resulting in bibasilar atelectasis . However , there is a superimposed right basilar opacity which could represent aspiration or early pneumonia . Linear left basilar opacities reflect atelectasis versus focal scarring , unchanged since the ___ examination , but new neighboring opacities are also concerning for mild aspiration / consolidation . There is no pneumothorax . Blunting of the left costophrenic angle is suggestive of a tiny pleural effusion .
    OUTPUT:
    
1 . Right basilar aspiration or consolidation . 2 . Possible left basilar consolidation or aspiration . 3 . Bibasilar atelectasis in the setting of low lung volumes . 4 . Tiny left pleural effusion .