Purpose: To determine if there is a difference in dose-area-product (DAP) or fluoroscopy time between electrophysiology (EP) procedures performed using a mobile and a fixed C-arm fluoroscopic unit. Method and Materials: DAP and fluoroscopy-time data was logged for 800 EP procedures performed using a mobile C-arm unit from 2003 to 2005. In early 2006, a fixed C-arm unit was installed and the same data logged for over 200 procedures. The procedures

Purpose To report on the first time the asymmetric stents were used to treat cerebrovascular aneurysms models in animals. Materials and Methods An asymmetric vascular stent (AVS) contains a low porosity patch-like region designed to cover the aneurysm neck and occlude blood flow into the aneurysm, thus enabling embolization without endangering nearby small perforator vessels. We laser micro-welded a steel mesh patch, with platinum markers at the

Purpose: In response to FDA advisories of the potential for skin injuries from fluoroscopically-guided interventions, logs have been recorded of procedure-related information for all fluoroscopic cardiac studies performed at our hospital. The data includes dose area product (DAP), estimated entrance skin dose (ESD), fluoroscopy time, number of digital runs, image-intensifier magnification mode, and patient weight and height as well as procedure type

Purpose: To provide patient-specific phantoms for investigating new endovascular image-guided interventional (EIGI) devices such as stents. Methods and Materials: A human cerebral/saccular aneurysm phantom was constructed from a patient’s segmented CT-scan data. The CT-derived vascular lumen was converted to a standard stereolithography (STL) computer file which was used, through a rapidprototyping process, to make a plastic resin (Accura 25) mold

Purpose: Digital subtraction angiography (DSA) is currently used to evaluate the result of endovascular treatments, either visually or using time-density curves (TDC) which quantitate the change of contrast as a function of time for the entire aneurysm. Regional analysis (R-TDCs) of flow patterns in sub-volumes of an aneurysm was employed in this study to extract local flow information to determine the result of treatment with a partially-occluding

Effective minimally invasive treatment of cerebral bifurcation aneurysms is challenging due to the complex and remote vessel morphology. An evaluation of endovascular treatment in a phantom involving image-guided deployment of new asymmetric stents consisting of polyurethane patches placed to modify blood flow into the aneurysm is reported. The 3D lumen-geometry of a patient-specific basilar-artery bifurcation aneurysm was derived from a segmented

In this study we compare the results obtained from Time-Density Curve (TDC) analysis of angiographic imaging sequences with histological evaluation for a rabbit aneurysm model treated with standard stents and new asymmetric vascular stents (AVS) placed by image-guided endovascular deployment. AVSs are stents having a low-porosity patch region designed to cover the aneurysm neck and occlude blood flow inside. To evaluate AVSs, rabbits with elastase-induced