Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been placement of a left subclavian central venous catheter with the tip terminating in the mid SVC . Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Lungs are clear . There is no pleural effusion or pneumothorax . There is incomplete visualization of hardware fixating a right humeral head fracture .
    OUTPUT:
    
Adequate positioning of a left subclavian central venous catheter .