Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary vascular congestion without pulmonary edema is similar to the prior study . Airspace opacities in bilateral costophrenic angles may represent atelectasis in the setting of lower lung volumes . The cardiomediastinal silhouette , including moderate cardiomegaly and a tortuous descending aorta is unchanged . There is no pneumothorax or focal consolidation .
    OUTPUT:
    
Mild pulmonary vascular congestion . Bilateral costophrenic angle airspace opacities represent atelectasis . Moderate cardiomegaly . No focal consolidation .