Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were compared to previous exam from ___ . Somewhat linear opacity at the right lung base medially is unchanged from prior and potentially due to scarring versus atelectasis . Elsewhere , the lungs remain clear and there is no effusion . Cardiac silhouette is stable . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .