Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is unchanged . Mild cardiomegaly may be present , with a left ventricular configuration and there is mild unfolding of the aorta . There is upper zone redistribution , without other evidence of CHF . No focal infiltrate or effusion is identified . No pneumothorax or free air beneath the diaphragm is detected . Mild wedging of a mid thoracic vertebral body is unchanged . Acute mild to moderate thoracic spine degenerative changes are again noted .
    OUTPUT:
    
No acute pulmonary process identified .