Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left - sided chest tube with interval decrease in left pleural effusion . Lung volumes remain low and right base opacity persists but is less conspicuous . There is subtle evidence of bilateral pulmonary pulmonary nodules / cavitary lesions , better assessed on prior CT . Left base opacity may be due to combination of small pleural effusion , atelectasis and pneumonia . The left hemidiaphragm may be mildly elevated . No pneumothorax is seen .
    OUTPUT:
    
No pneumothorax . Interval decrease in left pleural effusion . Persistent bibasilar opacities ; pulmonary nodules better assessed on CT .