TITLE

Variability in Arteriographic Assessment of the Carotid Bifurcation

AUTHOR(S)
Fisher, Mark; Ahmadi, Jamshid; Chi-Shing Zee; Weiner, John M.
PUB. DATE
February 1987
SOURCE
Angiology;Feb1987 Part 1, Vol. 38 Issue 2, p116
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We evaluated interobserver and intraobserver variability in the arteriographic assessment of the carotid bifurcation. Two neuroradiologists evaluated area stenosis and lumen surface morphology for 60 biplane carotid arteriograms in two reading sessions. Absolute interobserver differences for area stenosis averaged 8.8%, and interobserver differences were statistically significant for arteries of at least 50% stenosis. Analysis of observations for lumen surface morphology revealed statistically significant interobserver differences, averaging 29.5% disagreement. Intraobserver differences were not statistically significant. Observer variability for arteriography should be considered in the process of evaluating patients for carotid endarterectomy.
ACCESSION #
16478978

 

Related Articles

  • A remodelling metric for angular fibre distributions and its application to diseased carotid bifurcations. Creane, Arthur; Maher, Eoghan; Sultan, Sherif; Hynes, Niamh; Kelly, Daniel; Lally, Caitríona // Biomechanics & Modeling in Mechanobiology;Jul2012, Vol. 11 Issue 6, p869 

    Many soft biological tissues contain collagen fibres, which act as major load bearing constituents. The orientation and the dispersion of these fibres influence the macroscopic mechanical properties of the tissue and are therefore of importance in several areas of research including constitutive...

  • A bifurcation problem governed by the boundary condition II. García-Melián, Jorge; Rossi, Julio D.; Sabina De Lis, José C. // Proceedings of the London Mathematical Society;2007, Vol. 94 Issue 1, p1 

    In this work we consider the problem Δu = a(x)up in on ∂Ω, where Ω is a smooth bounded domain, ν is the outward unit normal to ∂Ω, λ is regarded as a parameter and 0 < p < 1. We consider both cases where a(x) > 0 in Ω or a(x) is allowed to vanish in a whole...

  • Bifurcation analysis of a delayed predator-prey fishery model with prey reserve in frequency domain. Changjin Xu // World Academy of Science, Engineering & Technology;Aug2011, Issue 56, p792 

    In this paper, applying frequency domain approach, a delayed predator-prey fishery model with prey reserve is investigated. By choosing the delay Ï„ as a bifurcation parameter, It is found that Hopf bifurcation occurs as the bifurcation parameter Ï„ passes a sequence of critical values....

  • Stability and bifurcation analysis of a discrete Gompertz model with time delay. Yingguo Li // World Academy of Science, Engineering & Technology;Aug2011, Issue 56, p1441 

    In this paper, we consider a discrete Gompertz model with time delay. Firstly, the stability of the equilibrium of the system is investigated by analyzing the characteristic equation. By choosing the time delay as a bifurcation parameter, we prove that Neimark-Sacker bifurcations occur when the...

  • Dynamics of poloidal flows in enhanced reverse shear bifurcation. Srinivasan, R.; Avinash, K. // Physics of Plasmas;Jul2005, Vol. 12 Issue 7, p072507 

    A simple reduced enhanced reverse shear (RERS) model is constructed to study the dynamics of poloidal flows during the ERS transition. This model predicts that a reversal of poloidal flow shear occurs just prior to the transition, as seen in experiment [R. E. Bell et al., Phys. Rev. Lett. 81,...

  • Singularity analysis of a two-dimensional elastic cable with 1:1 internal resonance. Zhao-hong Qin; Yu-shu Chen; Jun Li // Applied Mathematics & Mechanics;Feb2010, Vol. 31 Issue 2, p143 

    A two-degree-of-freedom bifurcation system for an elastic cable with 1:1 internal resonance is investigated in this paper. The transition set of the system is obtained with the singularity theory for three cases. The whole parametric plane is divided into several different persistent regions by...

  • Solutions to semilinear p-Laplacian Dirichlet problem in population dynamics. Mashiyev, R.; Alisoy, G.; Ogras, S. // Applied Mathematics & Mechanics;Feb2010, Vol. 31 Issue 2, p247 

    In this article, we study a semilinear p-Laplacian Dirichlet problem arising in population dynamics. We obtain the Morse critical groups at zero. The results show that the energy functional of the problem is trivial. As a consequence, the existence and bifurcation of the nontrivial solutions to...

  • Inverse bifurcation analysis: application to simple gene systems. Lu, James; Engl, Heinz W.; Schuster, Peter // Algorithms for Molecular Biology;2006, Vol. 1, p11 

    Background: Bifurcation analysis has proven to be a powerful method for understanding the qualitative behavior of gene regulatory networks. In addition to the more traditional forward problem of determining the mapping from parameter space to the space of model behavior, the inverse problem of...

  • Pattern Formation and Continuation in a Trineuron Ring with Delays. Guo, Shang Jiang; Huang, Li Hong // Acta Mathematica Sinica;May2007, Vol. 23 Issue 5, p799 

    In this paper, we consider a single-directional ring of three neurons with delays. First, linear stability of the model is investigated by analyzing the associated characteristic transcendental equation. Next, we studied the local Hopf bifurcations and the spatio-temporal patterns of Hopf...

  • The phase-modulated logistic map. Nandi, Amitabha; Dutta, Debabrata; Bhattacharjee, Jayanta K.; Ramaswamy, Ramakrishna // Chaos;Jun2005, Vol. 15 Issue 2, p023107 

    We study the logistic mapping with the nonlinearity parameter varied through a delayed feedback mechanism. This history dependent modulation through a phaselike variable offers an enhanced possibility for stabilization of periodic dynamics. Study of the system as a function of nonlinearity and...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics