Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , which limits evaluation . There is mild vascular congestion without overt edema , unchanged from the prior exam . There is no focal consolidation , pleural effusion , or pneumothorax . The mediastinal contours are normal . The heart size is at the upper limits of normal , and unchanged .
    OUTPUT:
    
Stable mild vascular congestion without overt edema or evidence of pneumonia .