Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been progressive worsening of bilateral interstitial opacities from ___ . Given the absence of supporting radiographic evidence for pulmonary edema , this is thought to be compatible with atypical pneumonia . No pleural effusion and the heart size is normal . The mediastinal and hilar contours are unremarkable . No pneumothorax .
    OUTPUT:
    
Without supportive radiographic evidence for pulmonary edema , the worsening bilateral interstitial opacities are compatible with atypical pneumonia .