Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size remains normal . Mediastinal and hilar contours are unchanged . Lungs are grossly clear though assessment of the left apex is limited due to the patient 's neck projecting over and obscuring this region . No focal consolidation , pleural effusion or pneumothorax is seen . Pulmonary vasculature is not engorged . Right shoulder arthroplasty is incompletely imaged . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .