Unlike coronary vasculature, intracranial vessels are more challenging to stent because they are difficult to navigate due to their very tortuous course and sharp angles, and those vessels are delicate and more susceptible to injury due to lack of supporting connective tissue.
At the second stage, choose from these lines the one which, for a given gradient, is the shortest and the least tortuous, that is, where the angles between the straight sections are as open as possible.
When she first emerged she was all angles, elbows, eccentricities and tortuous metaphors - like a blonde, female hybrid of Russell Brand and Noel Fielding.
Generally speaking, a wider distribution of turning angles indicate a more tortuous path comprising many turns, whereas a narrower distribution usually corresponds to more directed movement.
We assessed arteriolar and venular narrowing, arteriolar optimality deviation, and other quantitative aspects of the retinal microvasculature.Arterioles were significantly narrower and longer, had wider branching angles, and were more tortuous than venules.
This is a key limitation for microcirculation imaging as blood vessels within the tissue are orientated at varying angles and can be tortuous in shape.
Hagen finds a comic angle on that, but takes a tortuous route to get there.
A 70-year-old female with a history of primary angle closure glaucoma presented with 4 mm of proptosis, resistance to retropulsion, tortuous corkscrew blood vessels and an orbital bruit of the right eye.
Movement behaviour could be adequately modelled in 70% of the cases by a correlated random walk (CRW) with lognormal move length and von Mises (circular normal) turning angles; these distributions are environment-specific (matrix vs habitat), which allows modelling both tortuous movements in the habitat and straight movements in the matrix under the same CRW framework.
For individual-based simulation models, if the spurious effects of measurement error are not removed from turning angle distributions, movement paths will overestimate the frequency that animals return to previously visited locations and predict overly tortuous movement.
