Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is slightly limited due to patient rotation . Additionally the left lung apex is obscured due to overlying soft tissue from the patient 's neck and chin . The heart is mild to moderately enlarged . Calcifications of the aortic arch are present . There is mild pulmonary vascular congestion . Patchy opacity in the retrocardiac region could reflect atelectasis , but infection is not excluded . Eventration of the left hemidiaphragm is noted . No large pleural effusion or pneumothorax is seen . There is diffuse demineralization of the osseous structures .
    OUTPUT:
    
Limited exam due to patient rotation . Mild pulmonary vascular congestion . Patchy retrocardiac opacity could reflect atelectasis but infection can not be excluded .