Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided ICD with the tip in the right ventricle . Low lung volumes with crowding of the bronchovascular markings . Right lower lung zone opacity may reflect a combination of atelectasis , crowded vessels and posterior rib , rather than pneumonia . No overt pulmonary edema . Mild cardiac enlargement . No pleural effusions or pneumothorax .
    OUTPUT:
    
No pneumothorax . Right lower lung zone opacity is probably a combination of atelectasis , crowded vessels and posterior rib , rather than pneumonia . If there are symptoms of infection , repeat chest radiographs including oblique views should be obtained .