Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate relatively low lung volumes with unchanged tortuosity of the aorta . There is no pneumothorax , pulmonary edema , pleural effusion or focal opacification within the lungs . The cardiac silhouette is unchanged since the prior study .
    OUTPUT:
    
No acute cardiopulmonary process .