Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates interval removal of right - sided chest tube with resultant small apical pneumothorax . There is no evidence of tension . There is a persistent large left pleural effusion with bibasilar opacities which appears improved on the left and slightly worse on the right . This opacification is most likely atelectasis although the differential diagnosis includes aspiration and pneumonia . A right subclavian line terminates at the level of the mid to low SVC . Cardiomediastinal silhouette remains stable .
    OUTPUT:
    
Interval removal of right - sided chest tube with new small apical pneumothorax . Bibasilar opacities ( left greater than right ) , likely due to atelectasis , although the differential includes aspiration and pneumonia .