Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size remains mildly enlarged but unchanged . The mediastinal contour is similar with mild unfolding of the thoracic aorta . There is crowding of the bronchovascular structures with interval improvement in the previous pattern of mild pulmonary edema . Patchy a atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities detected .
    OUTPUT:
    
Previously noted mild pulmonary edema has improved . Mild bibasilar atelectasis .