Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Lungs are symmetrically expanded and clear . Pulmonary vascular congestion is unchanged . There is no focal consolidation . Heart is mildly enlarged . The cardiomediastinal contour including tortuosity of the thoracic aorta is stable . Calcifications are again noted in the aortic arch . There is no pleural effusion or pneumothorax . Degenerative changes in the spine have progressed compared to the prior examination and exaggerated thoracic kyphosis is again noted .
    OUTPUT:
    
No acute intrathoracic abnormality . Chronic pulmonary vascular congestion .