Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , likely secondary to lack of inspiratory effort . The lungs are otherwise clear . No focal consolidation , pulmonary edema , pleural effusion , or pneumothorax . The heart size is normal . The mediastinum is not widened . The hila are unremarkable . The descending aorta is slightly tortuous . There is slight blunting of the lateral border of the descending aorta , likely atelectasis .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . No mediastinal widening .