Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , improved aeration of the lung bases which are now clear . Extensive pleural thickening and pleural calcifications are unchanged . Right Sided prior fiducial marker in the right upper lobe also not substantially changed . No pulmonary edema . Heart size is mildly enlarged .
    OUTPUT:
    
Improved aeration of the lung bases suggesting atelectasis .