Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright view of the chest is compared to previous exam from ___ . The lungs are clear . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable . There is mild lower thoracic dextroscoliosis , as on prior . No free air is seen below the diaphragm .
    OUTPUT:
    
No free air below the diaphragm , no acute cardiopulmonary process .