Computed tomography scanning for endograft planning: evolving toward three-dimensional, single source imaging.

One of the most fundamental differences between open surgical repair of aortic aneurysms and treatment by endograft exclusion is the dependency on imaging for all critically important aspects of the endovascular approach. Patient selection and preprocedure planning for device selection and sizing depend on imaging. Computed tomography (CT) scanning for endograft planning is capable of providing accurate and complete measurement data. There are problems with diameter, length, and angulation measurement when using conventional two-dimensional (2D) axial CT images that can be partly overcome by expert interpretation. However, when computerized 3D programs that include easy-to-use measurement tools process CT data, the problems of 2D CT scan data are relieved. In addition, virtual simulation of various endograft choices can be modeled within computerized renderings of patient-specific anatomy that allow testing of alternatives and provide an intuitive understanding during the planning phase.