Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs are obtained . Low lung volumes is unchanged compared to the prior radiographs . Cardiomediastinal silhouette is top normal . There is no focal area of consolidation or large pleural effusion . Rounded left perihilar density is virtually unchanged compared to the prior radiograph and correlates with a large left pulmonary artery seen on CT .
    OUTPUT:
    
Minimally changed compared to the prior radiograph of ___ without evidence of pneumonia or pulmonary edema .