Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are no focal lung consolidations . Bibasilar atelectatic changes are noted . Heart size is mildly enlarged without pulmonary vascular congestion . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Bibasilar atelectasis is noted . 3 . Mild cardiomegaly without pulmonary vascular congestion .