Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears borderline in size . The aorta is tortuous with patchy calcification . The cardiac , mediastinal and hilar contours appear stable . The lungs appear clear . There are no pleural effusions or pneumothorax . A mild compression deformity of the T6 vertebral body appears unchanged . A severe compression deformity of L1 ( vertebra plana ) appears unchanged with stable alignment abnormality . The bones appear demineralized .
    OUTPUT:
    
No evidence of acute disease . Stable compression fractures .