Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . A moderate size hiatal hernia is visualized . The hilar contours are normal . No pulmonary vascular engorgement is seen . Asymmetric patchy opacity is noted within the left lung base . Somewhat linear and reticular opacities in the right mid lung field may reflect scarring . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy opacity within the left lung base could reflect an area of infection . Moderate size hiatal hernia .