Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is elevation of the left hemidiaphragm with mild left basilar atelectasis . The lungs are otherwise clear without focal consolidation , pleural effusion or pneumothorax . The pulmonary vasculature is not engorged . The cardiac silhouette is incompletely evaluated due to silhouetting of the left heart border . There is tortuosity of the thoracic aorta . No acute osseous abnormality is detected .
    OUTPUT:
    
Elevation of the left hemidiaphragm of uncertain etiology with mild left basilar atelectasis .