Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs demonstrate symmetric well - expanded lungs . The appearance of the cardiomediastinal silhouette is unchanged compared to the prior examination . Lungs are clear without focal areas of consolidation . There is no pleural effusion and no pneumothorax . Degenerative changes are again noted in the spine .
    OUTPUT:
    
No acute intrathoracic pathology .