Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is slightly rotated to the right . The right Port - A - Cath is in stable position . Lung volumes remain low with basilar atelectasis , though improved on the left . The cardiomediastinal silhouette is stable . There is no pneumothorax .
    OUTPUT:
    
Improved left basilar atelectasis compared to ___ , less likely pneumonia .