Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . The patient 's chin overlies the superior mediastinum and the lung apices . Volumes are low . Allowing for these limitations , the lungs appear clear . No definite consolidation or pulmonary edema . No large effusion or pneumothorax . Bony structures appear grossly intact .
    OUTPUT:
    
Limited , negative .