Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated reflective of COPD . Apparent increased opacity projecting over the right lung apex correlates with posterior right fifth rib fracture with callus . Streaky bibasilar opacities likely reflect atelectasis . There is a rounded retrocardiac opacity on the frontal view which likely corresponds to vague opacity in the posterior costophrenic angle on the lateral view . There is no focal consolidation to suggest pneumonia . There is no pleural effusion or pneumothorax . The heart is normal in size , and the mediastinal contours are normal . High density at the left hilum may represent calcified lymph node .
    OUTPUT:
    
No acute cardiopulmonary process . Focal rounded opacity in the retrocardiac region likely posteriorly on the lateral view which may correspond to a Bochdalek 's hernia although not fully characterized . Nonurgent CT suggested unless prior imaging performed elsewhere available to confirm .