Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is poor inspiratory effort and low lung volumes . Focal opacity at the left costophrenic angle is likely secondary to atelectasis . The heart size , mediastinal , and hilar contours are normal . The lungs are otherwise clear without pleural effusion , focal consolidation , or pneumothorax . Colonic interposition between the right hemidiaphragm and the liver is identified . No free subdiaphragmatic air .
    OUTPUT:
    
No acute cardiopulmonary process .