Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . Low lung volumes and portable technique exaggerate heart size . Cardiac and mediastinal contours are stable . Pulmonary vascular congestion has worsened since ___ . Right middle lobe and retrocardiac opacities are nonspecific and may represent atelectasis and dependent edema , but pneumonia precipitating edema is a possibility . No large pleural effusion or pneumothorax .
    OUTPUT:
    
Heart failure . Needs followup to exclude preexisting pneumonia .