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 ___ . The lungs are clear of focal consolidation . Opacity at the left lung base most suggestive of atelectasis or scar . There is no effusion . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable . No free air is seen below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .