Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is seen normal . Mediastinal and hilar contours are unchanged with the aorta appearing mildly tortuous . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . A nodular opacity measuring 8 mm projects over the left fifth posterior rib , not changed from the previous exam . No acute osseous abnormality is detected .
    OUTPUT:
    
No radiographic evidence for pneumonia .