Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low inspiratory volumes the right hemidiaphragm is again elevated . There is bibasilar atelectasis , similar in appearance to ___ . No new focal opacity is identified . Cardiomediastinal silhouette is grossly unchanged . No CHF . No gross right or left effusion .
    OUTPUT:
    
1 . Patchy opacities at both lung bases are similar to ___ and likely represent atelectasis . The possibility of an early pneumonic infiltrate can not be entirely excluded , but , given relative stability over time , , this is considered less likely . 2 . No CHF or gross effusion .