Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal shadow is unchanged . Unfolding of the thoracic aorta . Linear airspace opacification seen in the posterior basal aspect on the lateral view . This correlates with the linear opacities in the lower lung zones bilateral . Abdominal aortic stent in situ . Sclerotic appearance of the medial aspect of the right clavicle in keeping with a previous fracture . Old right - sided rib fractures . Wedge - type compression fractures involving the lower thoracic and superior lumbar vertebral bodies with a resultant kyphotic deformity is unchanged compared to prior . Osteopenic changes of the bony elements .
    OUTPUT:
    
Linear opacity in the lower lung zones bilateral most likely represents atelectasis , but in the correct clinical setting this could also represent pneumonia .