Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is increased opacity at the right lung base . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications are noted at the aortic arch . Right shoulder arthroplasty is partially visualized .
    OUTPUT:
    
Right basilar opacity , worse when compared to prior . This could be due to infection or aspiration . Repeat PA and lateral after treatment suggested to document resolution and to assess for the need of cross - sectional imaging given this finding being present and progressed since ___ .