Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable upright frontal chest radiograph demonstrates a left PICC with the tip at the confluence of the left brachiocephalic vein and SVC , unchanged in position compared to most recent chest radiograph . Lung volumes are slightly low , resulting in prominence of the cardiac silhouette and bronchovascular crowding . No focal consolidation , pleural effusion , or pneumothorax is seen . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Left PICC with the tip at the confluence of the left brachiocephalic vein and SVC , unchanged in position compared to the most recent chest radiograph .