Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Compared with ___ , there is more pronounced upper zone redistribution and vascular blurring . The bibasilar opacities are also somewhat more extensive . There is a probable small right effusion . A small left effusion can not be excluded . There are air bronchograms at the left lung base . The cardiomediastinal silhouette is obscured by surrounding opacities , but is overall similar to prior . The SVC and axillary stents are again noted , unchanged in position .
    OUTPUT:
    
Bibasilar collapse and / or consolidation , slightly more pronounced compared with ___ . The possibility of an associated infectious infiltrate can not be excluded . Small right and possible smaller left pleural effusion . Upper zone redistribution and diffuse vascular blurring . In a conventional setting , this appearance , all taken together , would be compatible with CHF and interstitial and alveolar edema . Given the history of HIV , if the patient has an appropriately low CD4 count , the differential for the interstitial opacities could include PCP .