Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Retrocardiac opacities are increased from prior study , likely reflect atelectasis . No large pleural effusion or pneumothorax . The heart is moderately enlarged . The mediastinum and hila are unchanged . The descending aorta is slightly tortuous , unchanged . General increased dense appearance of the bones in the thorax are unchanged from the prior exam . Mild biapical pleural thickening is unchanged . Eventration of the right hemidiaphragm is similar the prior exam . There appears to be right rib fractures
    OUTPUT:
    
Retrocardiac opacities are likely atelectases , superimposed infection can not be excluded please correlate clinical symptoms . .