Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable bilateral low lung volumes . The lungs are clear . No focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . Top normal heart size , overall unchanged . Overall stable appearance and mediastinal contours . Stable slightly dilated or descending aorta . Degenerative changes are noted in the bilateral costochondral junction . Anterior osteophytes are noted in the upper thoracic spine .
    OUTPUT:
    
No acute intrathoracic process .