Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are unchanged . The the cardiac size is top - normal . The aorta is elongated and tortuous . Nodular opacity projecting over the anterior left fourth rib is again noted . . Otherwise the lungs are clear . There is no pneumothorax or pleural effusion . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormalities Nodular opacity projecting over the anterior left fourth rib , warrants further evaluation with CT