Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs . Single - lead pacer is in stable position . Mild cardiomegaly and interstitial fibrosis are unchaged when compared to ___ . The pulmonary vessels are engorged compared to ___ , but there is no evidence of edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process . Mild chronic interstitial fibrosis .