Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is normal in size . Aorta is tortuous and calcified . Low lung volumes result in crowding of bronchovascular structures , particularly at the lung bases . No focal areas of consolidation are identified . There is a suggestion of a small right pleural effusion . Bones are diffusely demineralized .
    OUTPUT:
    
Low lung volumes . No definite pneumonia , but repeat radiograph with improved inspiratory level may be helpful for more complete evaluation of the lung bases when the patient 's condition permits .