Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there has been no significant interval change . Vague opacities projecting over the right mid lung and bilateral lower lungs are similar compared to prior . Left midlung chain sutures are again noted as well as biapical scarring . Known pulmonary nodules are not clearly delineated . There is no pleural effusion on the current exam . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities , compression deformity of a mid thoracic vertebral body is unchanged .
    OUTPUT:
    
Known underlying parenchymal opacities and nodules not clearly delineated . No evidence of superimposed acute cardiopulmonary process , no new consolidation .