Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest . The lung volumes are low . There is no overt edema or clear signs of pneumonia . The cardiac silhouette is mldly enlarged . There is no pneumothorax or pleural effusion . Visualized osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .