scholarly journals Overestimation of cerebral aneurysm wall thickness by black blood MRI?

2010 ◽  
Vol 31 (3) ◽  
pp. 766-766 ◽  
Author(s):  
David A. Steinman ◽  
Luca Antiga ◽  
Bruce A. Wasserman
Keyword(s):  
Cerebral Aneurysm ◽  
Wall Thickness ◽  
Black Blood ◽  
Aneurysm Wall ◽  
Black Blood Mri

Quantitative analysis of unruptured intracranial aneurysm wall thickness and enhancement using 7T high resolution, black blood magnetic resonance imaging

2021 ◽  
pp. neurintsurg-2021-017688
Author(s):  
Xinke Liu ◽  
Junqiang Feng ◽  
Zhixin Li ◽  
Zihao Zhang ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Intracranial Aneurysm ◽  
Wall Thickness ◽  
Signal Intensity ◽  
Spin Echo ◽  
Fast Spin Echo ◽  
Black Blood ◽  
Post Contrast ◽  
Isotropic Resolution ◽  
Aneurysm Size ◽  
Aneurysm Wall

BackgroundThis study was performed to quantify intracranial aneurysm wall thickness (AWT) and enhancement using 7T MRI, and their relationship with aneurysm size and type.Methods27 patients with 29 intracranial aneurysms were included. Three-dimensional T1 weighted pre‐ and post-contrast fast spin echo with 0.4 mm isotropic resolution was used. AWT was defined as the full width at half maximum on profiles of signal intensity across the aneurysm wall on pre-contrast images. Enhancement ratio (ER) was defined as the signal intensity of the aneurysm wall over that of the brain parenchyma. The relationships between AWT, ER, and aneurysm size and type were investigated.Results7T MRI revealed large variations in AWT (range 0.11–1.24 mm). Large aneurysms (>7 mm) had thicker walls than small aneurysms (≤7 mm) (0.49±0.05 vs 0.41±0.05 mm, p<0.001). AWT was similar between saccular and fusiform aneurysms (p=0.546). Within each aneurysm, a thicker aneurysm wall was associated with increased enhancement in 28 of 29 aneurysms (average r=0.65, p<0.05). Thicker walls were observed in enhanced segments (ER >1) than in non-enhanced segments (0.53±0.09 vs 0.38±0.07 mm, p<0.001).ConclusionImproved image quality at 7T allowed quantification of intracranial AWT and enhancement. A thicker aneurysm wall was observed in larger aneurysms and was associated with stronger enhancement.

Evaluation of cerebral aneurysm wall thickness in experimental aneurysms: Comparison of 3T-MR imaging with direct microscopic measurements

2013 ◽  
Vol 156 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Camillo Sherif ◽  
Günther Kleinpeter ◽  
Georg Mach ◽  
Michel Loyoddin ◽  
Thomas Haider ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Cerebral Aneurysm ◽  
Wall Thickness ◽  
Aneurysm Wall ◽  
3T Mr

scholarly journals Isotropic 3D black blood MRI of abdominal aortic aneurysm wall and intraluminal thrombus

2016 ◽  
Vol 34 (1) ◽  
pp. 18-25 ◽  
Author(s):  
Chengcheng Zhu ◽  
Henrik Haraldsson ◽  
Farshid Faraji ◽  
Christopher Owens ◽  
Warren Gasper ◽  
...  
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Black Blood ◽  
Intraluminal Thrombus ◽  
Aneurysm Wall ◽  
Abdominal Aortic ◽  
Abdominal Aortic Aneurysm Wall ◽  
Black Blood Mri

scholarly journals Aneurysm wall enhancement in black blood MRI correlates with aneurysm size. Black blood MRI could serve as an objective criterion of aneurysm stability in near future

2018 ◽  
Author(s):  
Athanasios K. Petridis ◽  
Andreas Filis ◽  
Elias Chasoglou ◽  
Igor Fischer ◽  
Maxine Dibué-Adjei ◽  
...  
Keyword(s):  
Contrast Enhancement ◽  
Scoring Systems ◽  
Aneurysm Rupture ◽  
Width Ratio ◽  
Anatomical Location ◽  
Black Blood ◽  
Objective Criterion ◽  
Aneurysm Wall ◽  
Black Blood Mri ◽  
Clinical Scoring

The increasing number of incidental intracranial aneurysms creates a dilemma of which aneurysms to treat and which to observe. Clinical scoring systems consider risk factors for aneurysm rupture however objective parameters for assessment of aneurysms stability are needed. We retrospectively analysed contrast enhancing behaviour of un-ruptured aneurysms in the black blood magnetic resonance imaging (MRI) in N=71 patients with 90 aneurysms and assessed correlation between aneurysm wall contrast enhancement (AWCE) and aneurysm anatomy and clinical scoring systems. AWCE is associated with aneurysm height and height to width ratio in ICA aneurysms. AWCE is correlated to larger aneurysms in every anatomical location evaluated. However the mean size of the contrast enhancing aneurysms is significantly different between anatomical localizations indicating separate analyses for every artery. Clinical scoring systems like PHASES and UIATS correlate positively with AWCE in black blood MRI. MRI aneurysm wall contrast enhancement is a positive predictor for aneurysm instability and should be routinely assessed in follow up of incidental aneurysms. Aneurysms smaller than 7 mm with AWCE should be followed closely with focus on growth, as they may be prone to growth and rupture.

Optimal processing of isotropic 3D black-blood MRI For accurate estimation of vessel wall thickness

2010 ◽  
Author(s):  
Bernard Chiu ◽  
Niranjan Balu ◽  
Li Dong ◽  
Xihai Zhao ◽  
Chun Yuan ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Vessel Wall ◽  
Accurate Estimation ◽  
Black Blood ◽  
Vessel Wall Thickness ◽  
Optimal Processing ◽  
Black Blood Mri

SENSITIVITY ANALYSIS OF COMPUTATIONAL STRUCTURAL DYNAMICS IN A CEREBRAL ANEURYSM MODEL TO WALL THICKNESS AND MODEL

2012 ◽  
Vol 12 (03) ◽  
pp. 1250054 ◽  
Author(s):  
ALVARO VALENCIA ◽  
MAXIMILIANO ROJO ◽  
RODRIGO RIVERA ◽  
EDUARDO BRAVO
Keyword(s):  
Cerebral Aneurysm ◽  
Structural Dynamics ◽  
Wall Thickness ◽  
Three Dimensional ◽  
Image Data ◽  
Realistic Model ◽  
Aneurysm Wall ◽  
Computational Structural Dynamics ◽  
Different Thickness ◽  
Aneurysm Model

Intracranial saccular aneurysms tend to be thin walled and stiffer compared with a normal artery. The current work describes computational structural dynamics (CSD) in an anatomically realistic model of a cerebral aneurysm located in the ophthalmic region, using different wall thickness, model data for the artery and aneurysm, and geometry size. The model was obtained from three-dimensional rotational angiography image data. The wall was assumed three-dimensional hyperelastic solid with different thickness in the artery and in the aneurysm regions. The effects of carotid siphon length are reported. The CSD was solved with the finite elements package ADINA. The predictions of stress and strain on the aneurysm wall were compared.

scholarly journals Associations between haemodynamics and wall enhancement of intracranial aneurysm

2021 ◽  
pp. svn-2020-000636
Author(s):  
Miaoqi Zhang ◽  
Fei Peng ◽  
Xin Tong ◽  
Xin Feng ◽  
Yunduo Li ◽  
...  
Keyword(s):  
Blood Flow ◽  
High Resolution ◽  
Ordinal Regression ◽  
Parent Artery ◽  
Black Blood ◽  
4D Flow Mri ◽  
4D Flow ◽  
Unruptured Intracranial Aneurysms ◽  
Black Blood Mri ◽  
Flow Mri

Background and purposePrevious studies have reported about inflammation processes (IPs) that play important roles in aneurysm formation and rupture, which could be driven by blood flow. IPs can be identified using aneurysmal wall enhancement (AWE) on high-resolution black-blood MRI (BB-MRI) and blood flow haemodynamics can be demonstrated by four-dimensional-flow MRI (4D-flow MRI). Thus, this study investigated the associations between AWE and haemodynamics in unruptured intracranial aneurysms (IA) by combining 4D-flow MRI and high-resolution BB-MRI.Materials and methodsBetween April 2014 and October 2017, 48 patients with 49 unruptured IA who underwent both 4D-flow MRI and high-resolution BB-MRI were retrospectively included in this study. The haemodynamic parameters demonstrated using 4D-flow MRI were compared between different AWE patterns using the Kruskal-Wallis test and ordinal regression.ResultsThe results of Kruskal-Wallis test showed that the average wall shear stress in the IA (WSSavg-IA), maximum through-plane velocity in the adjacent parent artery, inflow jet patterns and the average vorticity in IA (vorticityavg-IA) were significantly associated with the AWE patterns. Ordinal regression analysis identified WSSavg-IA (p=0.002) and vorticityavg-IA (p=0.033) as independent predictors of AWE patterns.ConclusionA low WSS and low average vorticity were independently associated with a high AWE grade for IAs larger than 4 mm. Therefore, WSS and average vorticity could predict AWE and circumferential AWE.

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