Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine AP radiograph of the chest demonstrates no airspace consolidation , but pulmonary vascular congestion as well as mild interstitial pulmonary edema . The heart size appears normal , but is obscured by external pacing pad . There is no pneumothorax . There is likely a left pleural effusion .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Pulmonary vascular congestion and mild interstitial pulmonary edema . 3 . Left pleural effusion .