Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal upright chest radiograph was obtained . Heart is normal in size and cardiomediastinal contour is unremarkable . Lungs are well expanded and symmetric bilaterally without focal areas of consolidation . There is no pleural effusion or pneumothorax . Bony structures are grossly intact .
    OUTPUT:
    
No acute intrathoracic abnormality .