Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided Port - A - Cath terminates in the cavoatrial junction . Mild cardiomegaly is unchanged . The mediastinal silhouette is unchanged . Increased opacity at the left lung base laterally likely represents atelectasis and pericardial fat . There is no pulmonary edema or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia .