Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable semi-erect chest radiograph was obtained . Lungs are well expanded and clear . No focal consolidation , effusion , or pneumothorax is present . The inferior left costophrenic angle is excluded from the field of view . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
No acute cardiopulmonary process .