Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate low lung volumes . There is airspace opacity along the right heart border . There is no pleural effusion , or pneumothorax . The heart size is normal , the mediastinal contours are normal .
    OUTPUT:
    
Low lung volumes , focal airspace opacity along right heart border . This could be aspiration or infection , though in a patient with pleuritic chest pain , pulmonary embolus is not excluded . Findings were e-mailed to the ED QA nurses .