Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . A faint ___- mm nodular opacity projecting within the left lower lobe and left anterior 7th rib is noted . Remainder of the lungs are clear . No pleural effusion , pneumothorax , or pulmonary edema . No acute osseous abnormalities are seen .
    OUTPUT:
    
___- mm nodular left lower lobe opacity , for which further assessment with chest CT is recommended . No acute cardiopulmonary abnormality otherwise identified .