Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The aortic arch is calcified . An extensive suggests pneumonia in the left lower lobe . For the most part , the lungs appear otherwise clear although there may be mild opacification in the lingula . There is no pleural effusion or pneumothorax . The bones appear demineralized .
    OUTPUT:
    
Left basilar opacification suggesting pneumonia . Follow - up radiographs are recommended to show resolution in ___ weeks .