Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . There has been no change since ___ including interstitial abnormality , seen best at the right lung base is stable and hazy opacification surrounding the left hilus . The stability these findings indicates that neither is due to interstitial edema or acute pneumonia . Given the abnormal appearance of a chest CT scan in these regions in ___ , I would strongly recommend a repeat chest CT to see if diagnostic intervention is necessary . Normal cardiomediastinal and hilar silhouettes and pleural surfaces .
    OUTPUT:
    
Bilateral pulmonary abnormalities , probably chronic or subacute , rather than acute , warranting chest CT evaluation .