Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left costophrenic angle is excluded from the field of view . Where seen , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No frank free intraperitoneal air identified .
    OUTPUT:
    
No definite acute cardiopulmonary process . Left costophrenic angle excluded from the field of view .