Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-erect portable view of the chest demonstrates low lung volumes , which accentuate bronchovascular markings . Costophrenic angles are blunted , suggestive of possible small pleural effusions . . Hilar and mediastinal silhouettes are enlarged by dilated vessels . Ill - defined right lung base opacity could be mild asymmetric edema . Heart size is top normal . No pneumothorax . Visualized osseous structure are intact .
    OUTPUT:
    
Mild biventricular heart failure .