Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Cystic lucencies at both lung bases correspond to known severe bronchiectasis . A pattern of bibasilar opacity on top of this bronchiectasis is unchanged since 4 :00 a .m . , but has progressed since ___ . An additional opacity in the left mid chest has improved . There are no new abnormal cardiac or mediastinal contours . There is no effusion or pneumothorax .
    OUTPUT:
    
Worsening bibasilar opacities superimposed on chronic bronchiectasis have progressed since ___ .