Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Apart from subsegmental atelectasis in the left lung base , the lungs are clear . No pleural effusion , pneumothorax , or focal consolidation is visualized . No acute osseous abnormality is seen . Partially imaged is fixation hardware within the right proximal humerus on the lateral view .
    OUTPUT:
    
No acute cardiopulmonary abnormality .