Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Comparison is made with the next preceding PA and lateral chest examination of ___ . On the present single view chest examination , extensive bilateral densities are seen in both lungs . As the densities have a tendency to be more marked centrally , it is most likely that it represents acute pulmonary edema . The progression since the next preceding chest examination is striking . No pneumothorax has developed .
    OUTPUT:
    
Acute pulmonary edema . Telephone call was directed to ___ to transmit acute deterioration . The message was accepted at 5 :06 p .m . ___