Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unchanged appearance of a left tunneled IJ hemodialysis catheter , the tip of which projects in the right atrium . There is an unchanged moderate right and small left pleural effusion . The lungs are otherwise clear , with interval improvement in interstitial edema . There is no pneumothorax . The cardiac silhouette remains mildly enlarged . Mediastinal contours are notable only for calcification of the aortic arch .
    OUTPUT:
    
Unchanged moderate right and small left pleural effusion without evidence of pneumonia , and interval improvement in interstitial edema .