Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs are provided . The lungs are well expanded bilaterally without focal area of consolidation . Heart is normal in size , and cardiomediastinal contours are unremarkable . There is no pleural effusion and no pneumothorax . No significant changes are seen compared to the radiograph of approximately two hours prior .
    OUTPUT:
    
No acute intrathoracic abnormality .