Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged . The aorta remains tortuous and calcified . The pulmonary vascularity is not engorged . Bilateral lower lobe airspace opacities are concerning for infection , though in the setting of hemoptysis , hemorrhage can can not be excluded . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities . Mild degenerative changes are noted in the thoracic spine as well as within the right shoulder .
    OUTPUT:
    
Bilateral lower lobe airspace opacities concerning for pneumonia . Given the patient 's history of hemoptysis , however , hemorrhage can have a similar appearance .