Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation , effusion , or edema . There is a 4 mm nodule projecting over the right mid to lower lung . Cardiomediastinal silhouette is within normal limits . Tortuosity of the descending thoracic aorta is noted .
    OUTPUT:
    
No acute cardiopulmonary process . A 4 mm nodule projecting over the right lower lung .