Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there has been near complete resolution of the bibasilar opacities with some persistent irregular interstitial markings , particularly in the retrocardiac region . Superiorly , lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Near complete resolution of previously seen bibasilar opacities with some residual retrocardiac consolidation and increased right basilar interstitial markings . Findings could be from resolving infection and / or scarring . Superimposed acute infection is not entirely excluded .