Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP radiograph of the chest was acquired . A right PICC ends in the low SVC , not significantly changed compared to the prior radiograph from ___ , although this PICC has apparently been exchanged in the interim . There is minimal bilateral lower lung atelectasis / scarring . There is no focal consolidation . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
Appropriate positioning of right PICC , ending in the low SVC . No acute cardiac or pulmonary process .