Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Lung volumes are low . Heart is top normal in size , and cardiomediastinal contour is unremarkable . Lungs are clear . There is no pleural effusion or pneumothorax . Vascular graft partially seen in the upper abdomen .
    OUTPUT:
    
Low lung volumes . Otherwise , no acute intrathoracic abnormality .