Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates interval removal of a left - sided chest tube . There is no pneumothorax . The previously seen left pleural thickening is unchanged since the prior study . There has been interval improvement in aeration of the left lower lung . The cardiomediastinal contours are stable in appearance . The right lung is unchanged compared to the prior study . Right subclavian line is also unchanged in position .
    OUTPUT:
    
Interval removal of left chest tube . No pneumothorax . Improved aeration of the left lower lung . Otherwise , unchanged since the prior study . The above findings were communicated to Dr . ___ by Dr . ___ ___ telephone at ___ , at the time of discovery .