Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine portable view of the chest . Left costophrenic angle and left lateral chest is excluded from the field of view , but patient was not able to cooperate for this examination to repeat film . Where seen , the lungs are clear . Previously seen enteric tube is no longer visualized . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No definite acute cardiopulmonary process .