Abstract 7T TOF MRI scans provide high resolution images of intracranial vasculature. When segmented, the Circle Willis is detailed and thus opens up new possibilities, in research but also education. We propose a segmentation pipeline for ofWillis, introduce prototype that enables exploration not just entire Willis, its centerline, an immersive VR enviroment. In our prototype, model can be fre...

BACKGROUND AND PURPOSE The anterior communicating artery (AcoA) and posterior communicating arteries (PcoA) of the circle of Willis provide the main route for collateral blood flow in cases of carotid artery obstruction. Transcranial color-coded duplex ultrasonography (TCCD) allows real-time measurement of the collateral function of the AcoA and PcoA. The primary objective of this study was to ...

OBJECTIVES The aim of the study was to evaluate the role of anatomical completeness of the circle of Willis for sufficient brain perfusion during unilateral cerebral perfusion and the methodology of the preoperative and intraoperative functional assessments of adequate cross-perfusion. METHODS This prospective observational study included all elective patients (99) who underwent elective open...

over the last three decades. This can be attributed to both advances in experience and technology including catheters, coils, intracranial balloons, and stents. Remodeling of wide-neck aneurysms using intracranial balloons and stents in difficult locations is now possible with a favorable risk profile. In many institutions, stent-assisted coiling is performed in cases where balloon-remodeling i...

BACKGROUND AND PURPOSE The purpose of the present study was to assess whether the direction of flow via the circle of Willis and the ophthalmic artery (OphA) changed over time in patients with a symptomatic occlusion of the internal carotid artery (ICA) who did not experience recurrent cerebral ischemic symptoms. METHODS Sixty-two patients with a symptomatic ICA occlusion were investigated wi...

INTRODUCTION This paper represents the numerical simulation of blood flow in the circle of Willis (CoW). Circle of Willis is responsible for the oxygenated blood distribution into the cerebral mass. To investigate the blood behavior, two Newtonian and non-Newtonian viscosity models were considered and the results were compared under steady state conditions. METHODS Methodologically, the arter...

BACKGROUND As a continuation of the previous findings in human fetuses, accidental finding of an accessory vascular component in the posterior part of CAC of human adult cadavers inspired the authors to present and compare its posterior part configuration. CASE PRESENTATION Examination was carried out on brains of 48 human adult cadavers, routinely dissected at the Institute of Forensic Medic...