Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is a retrocardiac opacity , which is likely atelectasis , although in the proper clinical setting , a pneumonia can not be excluded . The right lung is clear . There is no pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal , and likely accentuated by low lung volumes and positioning . Atherosclerotic calcifications are noted along the aortic arch . A fracture is noted through the body of the right scapula .
    OUTPUT:
    
1 . Retrocardiac opacity in the setting of low lung volumes is likely atelectasis , although in the proper clinical setting , pneumonia can not be excluded . 2 . Partially imaged right scapula fracture .