Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single lead AICD is present as is a left ventricular assist device . The tip of a right PICC line projects over the mid SVC and appears unchanged since the prior study . Unchanged enlargement of the cardiac silhouette and dense retrocardiac opacity . No findings to suggest pulmonary edema .
    OUTPUT:
    
No significant interval change since the prior study .