Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is moderate unfolding of the thoracic aorta . The arch is partly calcified . The heart is normal in size . There is no pleural effusion or pneumothorax . Streaky left basilar opacity suggests minor atelectasis . Otherwise , the lungs appear clear . There is mild loss in height of a lower thoracic vertebral body that appears chronic , although new since the remote prior radiographs . A mild anterior wedge compression deformity of T12 is better depicted on a CT from the same day .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .