Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided chest tube is seen with pigtail projecting over the left lower lung field . A residual small to moderate sized left - sided pneumothorax is present , with resolution of the previously seen signs of tension . The left lung has re-expanded , with streaky left basilar opacities possibly reflecting residual atelectasis . Right lung is clear . The cardiac , mediastinal , and hilar contours are normal is size and location , with resolution of the previously seen rightward shift .
    OUTPUT:
    
Status post placement of left - sided pigtail chest tube with interval re-expansion of the left lung , residual small to moderate left - sided pneumothorax , and resolution of the previously noted signs of tension .