Computed tomography is the most effective method for measuring and monitoring the maximum outer diameter of a thoracic aortic aneurysm over long periods of time.
What is the purpose of a CT scan for a thoracic aortic aneurysm?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What is the purpose of a CT scan for a thoracic aortic aneurysm? [/INST] \n Computed tomography is the most effective method for measuring and monitoring the maximum outer diameter of a thoracic aortic aneurysm over long periods of time.</s>