Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette remains enlarged , but pulmonary vascular congestion has improved , and previously present interstitial edema in the left lung has resolved . There remains a confluent patchy airspace opacification in the right lung , most prominent in the perihilar region . Additionally , a small - to - moderate partially loculated right pleural effusion is demonstrated as well as a small left pleural effusion . Bibasilar atelectasis has improved .
    OUTPUT:
    
Improved pulmonary vascular congestion . Asymmetrical right perihilar airspace opacities could reflect asymmetrical edema or pneumonia .