MRI findings of aneurysmal inside and walls associated with sac shrinkage after endovascular aortic repair

Motivation: To survey radiographical parameters to predict outcomes after EVAR. Goal(s): To reveal new MRI findings associated with aneurysmal shrinkage. Approach: Various MRI findings were extracted from fifty patients and the relationship between each finding and aneurysmal volume change was analyzed. Results: Lack of endoleak, endoleak with clear boundary shapes, homogenous signal pattern or uncomplex heterogenous signal pattern of intra-aneurysmal thrombus, and aneurysmal wall enhancement and thickening were noted as the factors for sac shrinkage. Impact: Some specific MRI findings as lack of endoleak, clear endoleak boundary, homogenous or uncomplex heterogenous thrombus, and aneurysmal wall enhancement thickening were noted as the factors for sac shrinkage.