Intracranial Aneurysm Segmentation in CTA: Method and Quantitative Validation

A. Firouzian, R. Manniesing, A. van der Lugt, H. Flach and W. Niessen

Annual Meeting of the Radiological Society of North America 2008.

PURPOSE: Automated and accurate segmentation of intracranial aneurysms from Computed Tomography Angiography (CTA) for characterizing aneurysm volume and shape RESULTS: The segmentation method successfully segmented the aneurysm and surrounding vasculature. The average surface distance between the method and the observers were 0.53A-A?A 1/2 0.19mm and 0.61A-A?A 1/2 0.22mm respectively, which was smaller than the interobserver average surface distance (0.95A-A?A 1/2 0.33mm). A pair T-test revealed that there was no significant difference in volume between the automatic segmentation and two observers (p=0.66, p=0.41). CONCLUSION: A method for semi-automated aneurysm segmentation has been presented which can replace manual segmentation.