Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are unchanged . Right upper lung mass and other smaller lung nodules are better seen in prior CT . Small left pleural effusion is new . There is no pneumothorax . Bibasilar opacities are likely atelectasis but superimposed infection can not be excluded in the appropriate clinical setting . Right middle lobe atelectasis are new .
    OUTPUT:
    
Small left effusion . Bibasilar opacities could be atelectasis or pneumonia in the appropriate clinical setting Right upper lobe lung mass and smaller lung nodules better evaluated in prior CT