Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Cardiac silhouette size is accentuated as result appearing mild to moderately enlarged . Mediastinal and hilar contours are grossly unremarkable . No pulmonary edema is present . Patchy opacities in the lung bases likely reflect areas of atelectasis . No large pleural effusion or pneumothorax is demonstrated . Clips in the right upper quadrant indicate prior cholecystectomy . A percutaneous catheter projects over the right upper quadrant of the abdomen .
    OUTPUT:
    
Limited study due to low lung volumes . Patchy opacities in lung bases likely reflect atelectasis , though infection can not be excluded in the correct clinical setting .