Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Asymmetric parenchymal density seen more on the left than the right . That on the right has shown some improvement alive for differences in positioning and technique . The heart is enlarged . The osseous structures are normal for age . Insert leads
    OUTPUT:
    
Partial clearing of the right basilar infiltrate . Asymmetric density remains on the left side . Although this could be due to pulmonary edema , pneumonia should be considered .