Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette , with stable mild unfolding of the thoracic aorta . The lungs are clear , with the exception of linear scarring in the left base . There is no pneumothorax , consolidation , or pleural effusion . Degenerative changes are seen in the right acromioclavicular articulation . Lower thoracic multilevel spondylosis is present .
    OUTPUT:
    
No acute cardiopulmonary process .