In thoracic aortic aneurysms, what are the advantages of CT/MRI?

In thoracic aortic aneurysms, what are the advantages of CT/MRI?

Sensitive and specific for diagnosis
Ideal for measuring and following the size of the aneurysm
Can detect mural thrombus or extravascular hematoma
Can reveal complications of aneurysm (e.g., bone erosion, compression of venous structures or airways)