Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . The aorta is moderately tortuous but unchanged . Mediastinal and hilar contours are stable . Lungs remain hyperinflated with mild increased interstitial markings at the lung bases compatible with chronic interstitial abnormality , as seen on the prior CT . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No radiographic evidence for pneumonia . Chronic interstitial abnormality , similar to the prior exam .