Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart is top normal in size . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion . Slight rightward indentation of the trachea is seen .
    OUTPUT:
    
No acute intrathoracic process . Slight rightward indentation of the trachea may reflect a goiter . Correlate with clinical exam .