Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Extremely low lung volumes are seen . There is new opacity at the left lung base laterally , potentially in part due to atelectasis ; however , is incompletely characterized . Cardiomediastinal silhouette is unchanged . Chest wall port is again noted . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Extremely low lung volumes . Increased opacity at the left lung base laterally , potentially due to atelectasis ; however , infiltrate can not be excluded . Repeat exam with better inspiratory effort may offer additional detail if patient is amenable .