Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were provided . There is mild prominence of interstitial markings consistent with mild pulmonary edema , slightly improved from the prior exam . Opacities at the bases , worse on the left , are most likely atelectasis . Cardiomediastinal silhouette is unchanged . There is no pleural effusion or pneumothorax . Osseous structures are grossly intact .
    OUTPUT:
    
Mild pulmonary interstitial edema , slightly improved from prior .