Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal chest radiograph demonstrates low lung volumes exaggerating moderate cardiomegaly . There is mild pulmonary vascular congestion . No focal consolidation , pleural effusion , or pneumothorax is appreciated . Of note , the left costophrenic angle is not included on the image .
    OUTPUT:
    
Mild pulmonary vascular congestion .