Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Subsegmental atelectasis and / or scarring is seen at both lung bases , not significantly changed compared to the prior chest radiograph from ___ . There are also new Kerley B lines at the bases suggesting edema . Mild cardiomegaly is not significantly changed . The mediastinal contours are unchanged . There are no definite pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . Findings suggesting mild vascular congestion . 2 . Unchanged mild cardiomegaly .