Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right upper lobe opacity is again seen ; as recommend on the prior study , nonurgent chest CT work above the right upper lobe nodular opacity is recommended . Linear left mid lung atelectasis / scarring is seen . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Persistent nodular right upper lobe opacity , for which , as was also recommended on the prior chest radiograph from ___ , CT workup of this opacity is recommended .