Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are unchanged . The pulmonary vasculature is normal . Patchy left lower lobe opacity is noted . Small left pleural effusion is also demonstrated . The right lung is clear . No pneumothorax is identified . No acute osseous abnormality is detected . Mild loss of height anteriorly of a vertebral body at the thoracolumbar junction is unchanged .
    OUTPUT:
    
Patchy opacity in the left lower lobe may reflect pneumonia with a small left pleural effusion .