Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright frontal view of the chest . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . The large hiatal hernia , better seen on the prior barium esophagram is again seen . The aortic knob is calcified . The cardiac and mediastinal contours are unchanged . There is a paucity of gas in the upper abdomen but no free air is seen . No acute osseous abnormality is seen .
    OUTPUT:
    
No acute cardiopulmoanry process . Paucity of gas in the upper abdomen . No free air .