Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 04 : 20 is submitted .
    OUTPUT:
    
The left subclavian PICC line now crosses the midline and has its tip in distal right brachiocephalic vein near the confluence with the superior vena cava . Repositioning is advised . Tracheostomy tube remains in satisfactory position . Lungs are now better inflated with residual streaky opacities at the bases likely reflecting atelectasis . The heart is enlarged . Aorta is unfolded and tortuous . No pulmonary edema . Minimal blunted left costophrenic angle may reflect a tiny effusion .