Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . There is a focal opacity overlying the left lung base , concerning for pneumonia . The heart size remains mildly enlarged with mild pulmonary vascular congestion . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Focal opacity overlying the left lung base concerning for pneumonia . 2 . Mild cardiomegaly with pulmonary vascular congestion .