Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild vascular congestion appears improved since ___ . The lungs are clear without focal opacity , interstitial pulmonary edema , pleural effusion or pneumothorax . Mild to moderate cardiomegaly is stable . Aortic knob calcifications are again noted .
    OUTPUT:
    
Improved pulmonary vascular congestion since over 6 , ___ . No new focal opacity concerning for pneumonia .