Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are grossly clear given low lung volumes . There is no pneumothorax or effusion . The cardiac silhouette appears enlarged , likely accentuated by low lung volumes . No acute osseous abnormalities identified . No free intraperitoneal air identified .
    OUTPUT:
    
No definite acute cardiopulmonary process given low lung volumes .