E-167 Imaging optimization for flow diversion in c-arm cone beam computed tomography

• DOI: 10.1136/neurintsurg-2020-snis.199
• Publication Date: 2020-08-06T18:40:49Z
• Authors: D Dornbos; J DiNitto; L Elijovich; D Hoit; V Inoa-Acosta; C Nickele; E Duckworth; A Arthur
• Keywords: Hounsfield scale

<h3>Introduction</h3> Contrast usage for Cone Beam Angiographic Computed Tomography (CBCTA) performance has limited efficacy simultaneous visualization of vasculature, implanted devices, and surrounding tissue. Optimal windowing CBCTA images in order to simultaneously visualize both low attenuating brain parenchyma high flow diverters remains a significant challenge. Appropriate dilution contrast the potential reduce gray scale value on vasculature allow enhanced visibility tissue parent artery. Currently, there been work done'pertaining optimal CBCTA.^{1 2} We present an vivo study aimed identify improve image quality setting diverting stents. <h3>Methods</h3> beam CT-based computed angiographic imaging (20 s DR, Syngo DynaCT, Siemens Healthineers, Forchheim, Germany) was performed 10 patients following placement Pipeline (Medtronic USA) stent. CT acquired with selective internal carotid artery catheterization utilizing 5 different percentages (5, 10, 15, 20, 25%) constant rate 3 mL/sec 80 cc contrast. Gray values were averaged pertinent structures (parent artery, device, bone, background) using region interest (ROI) analysis respective Hounsfield units. noise ratio (CNR) used measurement. that allows matched CNR bone provides ideal visualization. <h3>Results</h3> In evaluated this study, evaluation vessel identified 15% as embolization device within (figure 1A). Other concentrations had greater observed differences between 1B) decreased flow-diverting device. <h3>Conclusion</h3> The concentration administered during substantial impact attenuation (bone, parenchyma), which can impair Based analysis, optimizes its position <h3>References</h3> Duckworth, et al., Optimizing contrast-enhanced cone-beam protocol facilitate neurovascular pathologies interest. <i>Interventional Neuroradiology</i> 2019;7(1):102–110. DiNitto, Optimization C-arm conebeam tomography angiography suite. <i>Journal Neurointerventional Surgery</i> 2018;10:A80. <h3>Disclosures</h3> <b>D. Dornbos:</b> None. <b>J. DiNitto:</b> 5; C; Medical Solutions. <b>L. Elijovich:</b> 1; Hoit:</b> <b>V. Inoa-Acosta:</b> <b>C. Nickele:</b> <b>E. Duckworth:</b> <b>A. Arthur:</b>