Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Elevation of the left hemidiaphragm appears longstanding . Patient is status post left mastectomy . No focal consolidation is seen . Hilar and mediastinal silhouettes are unremarkable . Tortuosity of the descending aorta is again noted . The heart size is normal . There is no pulmonary edema or pneumothorax . No pleural effusion is seen . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .