Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right - sided PICC whose tip is at the RA - SVC junction . Previously seen right IJ central venous catheter is no longer visualized . Prior enteric tube is no longer seen . Lower lung volumes seen on the current exam . There is , however , slightly increased pulmonary vascular congestion compared to prior . Persistent dense retrocardiac opacity is seen silhouetting the left hemidiaphragm , as on prior . No acute osseous abnormality is detected .
    OUTPUT:
    
Pulmonary vascular congestion . Persistent retrocardiac opacity likely due to combination of atelectasis and effusion noting underlying infection is not excluded .