Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post left lower lobectomy . Cardiac , mediastinal , and hilar contours are unchanged , with mild leftward shift of mediastinal structures due to volume loss in the left lung . No focal consolidation , pleural effusion , or pneumothorax is seen . There are degenerative changes in the right acromioclavicular joint as well as within the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .