Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Low lung volumes are noted however there has been progression of the interstitial edema when compared to prior . There are persistent small bilateral pleural effusions . There is no superimposed region of consolidation . The cardiomediastinal silhouette is stable . Calcified mediastinal lymph nodes seen adjacent to the aortic arch . No acute osseous abnormality . Aortic valve prosthetic identified .
    OUTPUT:
    
Progression of pulmonary edema compared to prior .