Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Portable semi-upright radiograph of the chest demonstrates an unchanged cardiomediastinal silhouette and pulmonary vasculature . Again noted are linear streaky opacities in the right lower lung and left base , most consistent with atelectasis . No definite focal consolidation is identified .
    OUTPUT:
    
No acute intrathoracic abnormality .