Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are within normal limits . The pulmonary vasculature is normal . A peripheral wedge - shaped opacity is seen within the lingula . The right lung is clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Peripheral wedge - shaped opacity with the lingula is concerning for an area of infarction . Chest CTA is recommended for further assessment .