The predictor role of the aqueduct cerebrospinal fluid flow on endoscopic third ventriculostomy: explication on assumption physical model

Abstract

The flow pattern in the aqueduct was normalised and velocity was increased compared with those of preoperative values after a successful ETV. The flow of CSF in the prepontine cistern is routinely used for ventriculostomy patency assessment. In addition, aqueduct measurements may be useful in predicting ventriculostomy patency. The physical model provides valuable insights on a possible mechanism that affected the experimental data.

Influence of the area of the aqueduct and region of interest on quantification of stroke volume in healthy volunteers using phase-contrast cine magnetic resonance imaging

“…Previous studies have evaluated CSF flow in normal participants as well as pathological flow in patients with hydrocephalus (1,(6)(7)(8). PC-MRI has also been used to evaluate the patency of third ventriculostomies as well as shunt catheter flow (9)(10)(11).…”

“…Furthermore, despite the development of several semi-automated segmentation methods (14,15), manual ROI segmentation is still widely used (1–12). Although quantitative assessments of SV have been conducted at the aqueductal level, current calculation methods only select a static area of the ROI or use semi-automated methods for adapting contours at different time points and do not evaluate the impact of area changes on SV, even though other factors affecting flow measures were evaluated (11–17).…”

“…Furthermore, despite the development of several semiautomated segmentation methods (14,15), manual ROI segmentation is still widely used (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). Although quantitative assessments of SV have been conducted at the aqueductal level, current calculation methods only select a static area of the ROI or use semi-automated methods for adapting contours at different time points and do not evaluate the impact of area changes on SV, even though other factors affecting flow measures were evaluated (11)(12)(13)(14)(15)(16)(17). Therefore, the aim of the present study was to determine the extent to which the size of the aqueduct varied during the cardiac cycle and how ROI choice and size affected the calculated SV measured by PC-MRI.…”