Research On Assistant System Of Stent Selection For Cardiac Intervention

At present,cardiovascular disease has been considered to be one of the main causes of high mortality.Cardiac interventional therapy has become a common approach to the treatment of cardiovascular disease,because of its good therapeutic effect and fast recovery cycle.The selection method of cardiovascular stent is still mainly by means of the two-dimensional angiography and personal experience.However,the traditional selecting method is difficult to guarantee the correctness of stent selection.Moreover,.it is hardly to inherit and optimize the knowledge.Therefore,it is very important to study the assistant system of the stent selection for cardiac intervention based on three-dimensional.The selecting system to assist the medical personnel to choose stent based on the theory of production rules.It is mainly comprised of the parametric modeling of stent,the selection of stent and the coordinate matching between the vessel and the stent in the three-dimensional environment.This kind of system can not only overcome the limitations of the two dimensional angiography based sellecting method,but also can provide support to the clinical operation technology of stent selection.The selection system includes the role and authority control,the construction of the three-dimensional parametric model library,the auxiliary support of stent selection and the three-dimensional environment support.Visual C++ environment,SQL Server2008 database and Open CASCADE geometry kernel are used as the main development tools.Each module is designed in detail to construct the overall framework of the systerm and realize the according function.The role and authority control module can realize user classification and the access permission of the stent data.The construction of the three-dimensional parametric model library can help doctors directly select various parameters of the stent model,and provide parameters and entities for subsequent auxiliary selection.The auxiliary support of stent selection module is realized through the establishment of the fact base and rule base based on the production rule.The whole system is based on three dimensional environment.Coordinate matching can make the stents translate,rotate and scale by coordinate transformation in selected state.According to the data of the location of stenosis,the stent will be matched to the site of vascular stenosis,which can provide a more intuitive judgment.The three-dimensional stent selection system has improved the disadvantages of the traditional two-dimensional angiography,which is more intuitive,and it is also the foundation of subsequent three-dimensional interventional surgery.