Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette has slightly decreased in size , but there is persistent pulmonary vascular congestion and diffuse interstitial edema . More confluent opacities at the bases have slightly decreased , and may represent improving dependent edema .
    OUTPUT:
    
1 . Slight improvement in degree of pulmonary edema . 2 . Thoracic aortic aneurysm . Please see separately dictated MRA for evaluation of patient 's known aortic dissection .