Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal silhouettes remain stable , with mild calcifications seen at the aortic knob . Changes of bronchiectasis are seen bilaterally , with chronic interstitial changes very similar to the prior examination . There is no evidence of new consolidative process or significant pulmonary edema . Osseous structures appear grossly unchanged .
    OUTPUT:
    
No evidence of pneumonia . Chronic changes are likely in large part due to bronchiectasis .