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Research ArticleNeurointervention

Intracranial Aneurysm Neck Size Overestimation with 3D Rotational Angiography: The Impact on Intra-Aneurysmal Hemodynamics Simulated with Computational Fluid Dynamics

J.J. Schneiders, H.A. Marquering, L. Antiga, R. van den Berg, E. VanBavel and C.B. Majoie
American Journal of Neuroradiology January 2013, 34 (1) 121-128; DOI: https://doi.org/10.3174/ajnr.A3179
J.J. Schneiders
aFrom the Departments of Radiology (J.J.S., R.v.d.B., H.A.M., C.B.M.)
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H.A. Marquering
aFrom the Departments of Radiology (J.J.S., R.v.d.B., H.A.M., C.B.M.)
bBiomedical Engineering and Physics (H.A.M., E.v.B.), Academic Medical Center, University of Amsterdam, the Netherlands
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L. Antiga
cOrobix Srl. (L.A.), Bergamo, Italy.
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R. van den Berg
aFrom the Departments of Radiology (J.J.S., R.v.d.B., H.A.M., C.B.M.)
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E. VanBavel
bBiomedical Engineering and Physics (H.A.M., E.v.B.), Academic Medical Center, University of Amsterdam, the Netherlands
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C.B. Majoie
aFrom the Departments of Radiology (J.J.S., R.v.d.B., H.A.M., C.B.M.)
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Abstract

BACKGROUND AND PURPOSE: 3DRA is considered the reference standard for the assessment of intracranial aneurysm morphology. However, it has been shown that 3DRA may overestimate neck size compared with 2D DSA. The purpose of this study was to determine the impact of neck size overestimation with 3DRA on intra-aneurysmal hemodynamics.

MATERIALS AND METHODS: In a series of 20 patients, 20 intracranial aneurysms were analyzed for aneurysm neck size overestimation with 3DRA compared with 2D DSA. 3DRA-derived vascular models were modified to agree with 2D DSA. Geometric and hemodynamic variables of the original and modified vascular models were compared.

RESULTS: In 8 of the 20 evaluated cases, 3DRA-derived aneurysm models showed neck size overestimation compared with 2D DSA images. The average neck diameter reduction after modification was 19%, which was, on average, 0.85 mm (±0.32 mm). Modification of the neck resulted in differences in location of inflow jet (2/8), impingement zone (3/8), and low WSS area (4/8). In 1 case, the maximal WSS increased by 98% after modification. The change of impingement zone location resulted in a different classification of the impingement zone region in 2 cases.

CONCLUSIONS: Neck size overestimation on 3DRA can have non-negligible consequences for hemodynamic features determined with CFD.

ABBREVIATIONS:

3DRA
3D rotational angiography
CFD
computational fluid dynamics
VMTK
Vascular Modeling Toolkit
WSS
wall shear stress
  • © 2013 by American Journal of Neuroradiology
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American Journal of Neuroradiology: 34 (1)
American Journal of Neuroradiology
Vol. 34, Issue 1
1 Jan 2013
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Cite this article
J.J. Schneiders, H.A. Marquering, L. Antiga, R. van den Berg, E. VanBavel, C.B. Majoie
Intracranial Aneurysm Neck Size Overestimation with 3D Rotational Angiography: The Impact on Intra-Aneurysmal Hemodynamics Simulated with Computational Fluid Dynamics
American Journal of Neuroradiology Jan 2013, 34 (1) 121-128; DOI: 10.3174/ajnr.A3179

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Intracranial Aneurysm Neck Size Overestimation with 3D Rotational Angiography: The Impact on Intra-Aneurysmal Hemodynamics Simulated with Computational Fluid Dynamics
J.J. Schneiders, H.A. Marquering, L. Antiga, R. van den Berg, E. VanBavel, C.B. Majoie
American Journal of Neuroradiology Jan 2013, 34 (1) 121-128; DOI: 10.3174/ajnr.A3179
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  • Critical role of angiographic acquisition modality and reconstruction on morphometric and haemodynamic analysis of intracranial aneurysms
  • Does the DSA reconstruction kernel affect hemodynamic predictions in intracranial aneurysms? An analysis of geometry and blood flow variations
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  • Inflow Jet Patterns of Unruptured Cerebral Aneurysms Based on the Flow Velocity in the Parent Artery: Evaluation Using 4D Flow MRI
  • Additional Value of Intra-Aneurysmal Hemodynamics in Discriminating Ruptured versus Unruptured Intracranial Aneurysms
  • Hemodynamic Differences in Intracranial Aneurysms before and after Rupture
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  • Mind the Gap: Impact of Computational Fluid Dynamics Solution Strategy on Prediction of Intracranial Aneurysm Hemodynamics and Rupture Status Indicators
  • 3D Cine Phase-Contrast MRI at 3T in Intracranial Aneurysms Compared with Patient-Specific Computational Fluid Dynamics
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