Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , lung volumes have worsened and retrocardiac opacity has increased , consistent with left lower lobe collapse . Small left pleural effusion is new . No large effusion on the right . Right basilar opacities have improved . Vascular congestion has improved and there is no overt pulmonary edema . Heart size , which is difficult to assess in the setting of effusion , is mildly enlarged and unchanged . ET tube is in standard placement , unchanged . Right PIC line terminates at the cavoatrial junction .
    OUTPUT:
    
1 . Retrocardiac opacification reflects new left lower lobe collapse . New small left pleural effusion . 2 . Improved right basilar opacities , likely atelectasis . 3 . Stable mild cardiomegaly .