Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are stable . The heart is mildly enlarged . There are patchy opacities in both lower lungs , including within the lingula and right lower lobe , possibly the left lower lobe as well . These could be seen with pneumonia but more generally , there is also a mild interstitial abnormality suggestive of interstitial edema . A trace pleural effusion is suspected on the right . Fissures are thickened . Bones are not well assessed but no abnormality is identified .
    OUTPUT:
    
Patchy opacities in the lower lungs that could be seen seen with pneumonia but also with a background mild interstitial abnormality . This interstitial abnormality may be due to coinciding mild interstitial edema or potentially infection .