Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates a right chest port , its tip which projects over the anticipated location of the cavoatrial junction . Linear density within the right midlung zone likely reflects subsegmental atelectasis though fluid within the minor fissure is a possibility . Cardiomediastinal and hilar contours are stable relative to prior examination , the heart which is enlarged . No opacity convincing for pneumonia is present . There is no large pleural effusion . No evidence of pneumothorax or pulmonary edema .
    OUTPUT:
    
No opacity convincing for pneumonia . Interval placement of a right chest port . Probable subsegmental atelectasis within the right mid lung zone may alternatively reflect fluid within the minor fissure .