Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Lungs are well expanded and clear . There is no focal consolidation , pleural effusion or pneumothorax . There is a 3 mm nodule in the left lower lobe , possibly representing a calcified granuloma , less likely a vessel on end .
    OUTPUT:
    
No acute cardiopulmonary process .