Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . No prior . There are linear opacities suggested at the upper lungs bilaterally with retraction of the hila suggestive of chronic underlying disease . There is suggestion of a focal rounded opacity projecting over the anterior aspects of the lower thoracic spine on the lateral view and potentially abutting the lateral aspect of the descending thoracic aorta in the retrocardiac region . The lungs are otherwise clear and there is no effusion . Cardiomediastinal silhouette is within normal limits . Proximal left humeral hardware is identified . Diffuse osteopenia is also seen .
    OUTPUT:
    
No definite acute cardiopulmonary process . Subtle rounded opacity projecting over the lower lobe , potentially on the left . This could potentially due to superimposed shadows of degenerative changes in the spine and the adjacent aorta ; however , non-urgent chest CT is suggested to exclude underlying mass or thoracic aortic abnormality .