Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Lung volumes are slightly low . Lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . There appears to be residual oral contrast material within the right colon .
    OUTPUT:
    
No acute cardiopulmonary abnormality .