Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are slightly hyperinflated which may reflect a component of obstructive lung disease . There is no evidence of pneumothorax or pleural effusions . No focal opacities are seen to suggest pneumonia . The cardiomediastinal silhouette is unchanged . There is tortuosity of the thoracic aorta .
    OUTPUT:
    
No acute intrathoracic process .