Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . The hilar and mediastinal contours are stable since the ___ examination . There is central pulmonary vascular engorgement , but without overt edema , overall slightly less prominent in comparison to the ___ study . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
Mild cardiomegaly , with central vascular engorgement , but no edema or effusion .