Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP semi-upright view of the chest was obtained . Right IJ central venous catheter projects over the right atrium . An ICD pacing device with biventricular leads appears unchanged in position . Lung volumes remain low with right basilar atelectasis . Cardiomediastinal silhouette is stable . There is no focal consolidation or pleural effusion . No pneumothorax .
    OUTPUT:
    
1 . Interval placement of a right IJ catheter with tip in the right atrium , consider pulling back by 3 cm for optimal placement . 2 . Otherwise , no substantial changes compared to the prior examination .