Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates a normal cardiomediastinal silhouette and pulmonary vasculature . There is mild right hilar prominence , more subtle than on prior examination . No large focal consolidation is identified . No large pleural effusion or pneumothorax identified .
    OUTPUT:
    
No definite acute intrathoracic abnormality .