Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . Reticular appearance at the lung bases likely reflects known bronchiectasis seen on prior CT of the chest ___ likely with atalectasis . There is no new focal airspace opacity to suggest pneumonia . The heart is not enlarged . Mediastinal and hilar contours are normal . There is calcification of the aorta .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Persistent reticular abnormality at the lung bases likely reflects known bronchiectasis and atalectasis .