Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lordotic positioning . Again seen is a right subclavian line , with tip over distal SVC . No pneumothorax is detected . There is probable mild cardiomegaly , without significant interval change . There is upper zone redistribution , but no overt CHF . Possible minimal retrocardiac atelectasis . Otherwise , no focal infiltrate , consolidation , or gross effusion . Incidental note is made of bilateral cervical ribs . There is pseudoarticulation of the right cervical rib .
    OUTPUT:
    
1 . Mild cardiomegaly , unchanged . 2 . Upper zone redistribution , without overt CHF . No focal infiltrate or effusion . No pneumothorax detected . 3 . Bilateral cervical ribs noted .