Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vascularity is normal . 16 mm nodular density in the right lower lobe is unchanged , and has been relatively stable in size since the CT of the abdomen and pelvis from ___ . Lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality . 16 mm nodule within the right lower lobe is unchanged dating back to CT from ___ , but is new compared to the prior CT from ___ . Further evaluation with contrast - enhanced chest CT or PET - CT is recommended .