Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: At the right base , there is a slight irregular opacity , best seen on the lateral view . This is consistent with the patient 's history of known right lower lobe mass . In comparison to the prior chest radiograph from ___ , there has been no significant change in the size or appearance of this lesion . There is stable mild elevation of the right hemidiaphragm . There is no new consolidation , nodule , or pulmonary edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unchanged in appearance from the prior exam .
    OUTPUT:
    
1 . Stable appearance of right lower lobe mass within the limitations of technique . 2 . No evidence of acute pneumonia or pulmonary edema .