Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are stable with calcification of the aortic knob . Neither costophrenic angle is fully captured on this single portable image , however , there is no large pleural effusion . There is no pneumothorax . There is no focal consolidation concerning for pneumonia . Mild cephalization may be physiologic / positional . Median sternotomy wires are present .
    OUTPUT:
    
No acute abnormality .