Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided PICC catheter terminates 4 cm caudal to the carina and the distal SVC . Heart size is mildly enlarged . Mediastinal silhouette and hilar contours are otherwise unremarkable . Lungs are clear . Biapical scarring is unchanged . Pleural surfaces are otherwise clear without effusion or pneumothorax .
    OUTPUT:
    
1 . Adequate positioning of a left - sided PICC within the distal SVC . 2 . No acute cardiopulmonary abnormality .