Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal opacity to suggest pneumonia is seen . No pleural effusion , pulmonary edema , or pneumothorax is present . There is mild cardiomegaly and tortuosity of the aorta . A dual - lead left - sided pacemaker is in standard position . There are multilevel degenerative changes of the thoracic spine .
    OUTPUT:
    
No evidence of acute intrathoracic process .