Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged . A right - sided pacer is unchanged . There is mild prominence of the central vasculature without frank interstitial edema . Linear opacities within the left lung base are re - demonstrated and appears similar in morphology likely representing scarring . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .