Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest ___ at 14 55 are submitted .
    OUTPUT:
    
The dual lumen left internal jugular catheter is unchanged in position . A vascular stent is again seen projecting over the right upper mediastinum . Overall cardiac and mediastinal contours are stable status post median sternotomy with aortic valve replacement . The interstitium appears more prominent suggesting that there is now an element of superimposed interstitial edema . More focal nodular opacity in the right lower lobe is felt to either represent a nipple shadow as no corresponding abnormality seen on the CT study from ___ . , or possibly an early infiltrate . This can be better assessed on followup imaging . No pneumothorax .