Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ there has been mild interval development of vascular congestion , interstitial pulmonary edema . There are stable fibrotic changes demonstrated at the lung bases . There are no new focal opacities concerning for pneumonia . The cardiomediastinal and hilar contours are stable demonstrating mild cardiomegaly and tortuosity of the thoracic aorta . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
1 . Interval development of mild interstitial pulmonary edema and vascular congestion . No focal pneumonia . 2 . Stable bibasilar fibrotic change as better demonstrated on prior CT examinations such as ___ .