Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . No prior . The lungs are clear . Cardiomediastinal silhouette is within normal limits noting a tortuous partially calcified aorta . Degenerative changes noted at the shoulders . Osseous and soft tissue structures are otherwise unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .