Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of a left central venous catheter , the tip projecting over the left brachiocephalic / SVC confluence . Small left pleural effusion with adjacent atelectasis . Prominent pulmonary vasculature without frank pulmonary edema . The appearance of the cardiomediastinal silhouette is unchanged . An implantable loop recorder again projects over the left hemithorax .
    OUTPUT:
    
Interval placement of a left central venous catheter , the tip projecting over the confluence of the left brachiocephalic and SVC . Small left pleural effusion and adjacent atelectasis .