Comparison of 2D Digital Subtraction Angiography and 3D Rotational Angiography in the Evaluation of Dome-to-Neck Ratio

In this retrospective study, 3DRA measurements resulted in significantly lower dome-to-neck ratios and significantly larger proportions of aneurysms defined as "wide-neck" compared with 2D DSA. Scrutiny of 2D DSA may offer substantial benefit over 3D techniques when triaging patients to or from endovascular therapy.