Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , the lung volumes are lower . There is no opacity to suggest pneumonia . The azygos vein and pulmonary vessels appear more prominent , consistent with worsening vascular congestion . There is no frank pulmonary edema . No pleural effusion or pneumothorax is identified . Moderate cardiomegaly is unchanged .
    OUTPUT:
    
Slight interval increase in the degree of vascular congestion . No evidence of pneumonia .