Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph . Low lung volumes accentuate the interstitial markings . There is no focal consolidation , effusion , or pneumothorax . Cardiac and mediastinal contours are unremarkable . There are mild aortic arch calcifications . The tip of a right chest Port - A - Cath tip terminates in the cavoatrial junction . Thoracolumbar fusion rods are intact . The lungs are well expanded and clear . There is no focal consolidation , effusion , or pneumothorax . Cardiac and mediastinal contours are normal .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary process .