Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable supine chest radiograph is obtained . A left deep sulcus sign is again seen . No apical pneumothorax is visualized . Right lower and middle lobe atelectasis is unchanged . There are no fractures of the posterior left lateral spinal fusion hardware and intervertebral and vertebral disc spacers . Endotracheal tube terminates in appropriate position . A left - sided PICC line tip is difficult to visualize . A right - sided internal jugular line tip is also not seen . Left posterior rib fractures are partially visualized .
    OUTPUT:
    
Redemonstration of a left deep sulcus sign on this supine portable radiograph . Although no pneumothorax was clearly seen on the patient 's upright film this finding remains suspicious for a small anterior pneumothorax .