What is your preferred follow-up imaging modality for an incidentally found thoracic aortic aneurysm measuring 4.4 cm detected on CT?

It depends on the location. If proximal, I would use echo. If more distal, I would prefer MRA.

TTE allows for assessment of the root and proximal ascending aorta and is radiation-free. But it is generally suboptimal as a 2D tool, for the same reasons it is suboptimal in AV assessment for TAVR planning; accurate assessment of a 3D structure requires a 3D assessment tool.

That leaves CTA (contr...