Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild - to - moderate cardiomegaly and tortuosity of the thoracic aorta appear similar . Patchy and linear opacities at the lung bases have worsened , particularly on the left . There are no pleural effusions or pneumothoraces . Bones are diffusely demineralized , consistent with the patient 's advanced age .
    OUTPUT:
    
Worsening patchy and linear bibasilar opacities are probably due to atelectasis , but aspiration and developing infectious pneumonia are also possible . Short - term followup radiographs may be helpful in this regard .