Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . Compared to prior study from 5 days ago , there is significant improvement in the extent of pulmonary edema . Pulmonary arteries are dilated . Atelectatic changes in the right lower lung is noted . There is no large pleural effusion . Severe cardiomegaly appears stable . Calcified aortic knob is again seen .
    OUTPUT:
    
Significant improvement in extent of pulmonary edema .