Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . A previously described left perihilar nodule is not present on the current exam .
    OUTPUT:
    
No acute cardiopulmonary process . No pulmonary nodules identified - specifically , a previously described left perihilar nodule is not present on the current examination . CT is more sensitive for the detection of small pulmonary nodules .