Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal , and hilar contours are unremarkable . Bilateral low lung volumes are noted , but no focal consolidation , pleural effusion , or pneumothorax is identified . Cardiac silhouette is mildly accentuated by low lung volumes .
    OUTPUT:
    
No acute cardiopulmonary process .