Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse bilateral dense alveolar opacities . Evaluation of the lung bases is limited by overlying soft tissue and low lung volumes . Heart size appears enlarged , possibly in part exaggerated by AP technique and low lung volumes . Compared to prior exam , the mediastinum appears widened . No pneumothorax is detected on this view . Small bilateral pleural effusions may be present although evaluation is difficult due to overlying soft tissue .
    OUTPUT:
    
1 . Diffuse bilateral alveolar opacities . Differential diagnosis includes infection , edema , and ARDS . 2 . New mediastinal widening . If clinically feasible , further evaluation with CT is recommended . If not clinically feasible , close follow up radiography and clinical correlation is recommended . Findings and recommendations were discussed with ___ by ___ by telephone at 12 :08 p .m . on ___ at the time of discovery of these findings .