Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright single radiograph of the chest demonstrate heart size which appears top normal in size . Heart size however is inadequately assessed on AP views . Mediastinal and hilar contours are within normal limits . No evidence of pulmonary edema . No large pleural effusion is seen . No pneumothorax is identified . Visualized osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
No acute intra thoracic abnormality .