Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior study , a left - sided chest tube has been placed , with tip at the left lung apex . No obvious pneumothorax is identified , though a thin curvilinear lucency at the extreme apex of the left lung could represent either lucency from normal lung adjacent to rib or a extremely tiny pneumothorax . Small amount of subcutaneous emphysema along the left chest near the diaphragm is noted . Hazy opacity at the right lung base is new , likely a combination of a small effusion and underlying atelectasis . Patchy opacity at the left lung base is new and may also represent atelectasis or changes related to the ED chest tube . No gross left effusion . Upper zone redistribution , but doubt overt CHF . Cardiomediastinal silhouette is unchanged . Fusion construct at the thoracolumbar spine is new , grossly unremarkable on this limited assessment .
    OUTPUT:
    
Interval placement of left chest tube . Doubt pneumothorax , but attention to tiny curvilinear lucency at the left lung apex is recommended . This most likely represents ___ artifact of long adjacent to bone . New hazy opacity at the right lung base could represent a small effusion with atelectasis . No frank consolidation identified . Minimal opacity at the left lung is also noted , likely atelectasis , though an early infiltrate can not be entirely excluded . No gross left effusion . New fusion hardware seen at the thoracolumbar junction .