Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Mild coarsening of lung markings in the upper lungs is fairly similar to the prior study allowing for differences in technique . There is no pleural effusion or pneumothorax . The right hemidiaphragm is mildly elevated with respect to the left . The bones are probably demineralized .
    OUTPUT:
    
No evidence of acute disease .