Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright frontal view of the chest . The lungs are clear without focal opacity , pleural effusion or pneumothorax . The heart size is normal and the cardiac and mediastinal silhouettes are unremarkable . There is a paucity of gas in the upper abdomen . There is no acute osseous abnormality .
    OUTPUT:
    
No acute cardiopulmonary process .