scholarly journals Pseudo‐Enhancement in Intracranial Aneurysms on Black‐Blood MRI : Effects of Flow Rate, Spatial Resolution, and Additional Flow Suppression

2021 ◽  
Author(s):  
Mariya S. Pravdivtseva ◽  
Franziska Gaidzik ◽  
Philipp Berg ◽  
Carson Hoffman ◽  
Leonardo A. Rivera‐Rivera ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Flow Rate ◽  
Intracranial Aneurysms ◽  
Black Blood ◽  
Black Blood Mri

scholarly journals Wall enhancement segmentation for intracranial aneurysm

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Annika Niemann ◽  
Naomi Larsen ◽  
Bernhard Preim ◽  
Sylvia Saalfeld
Keyword(s):  
Intracranial Aneurysm ◽  
Intracranial Aneurysms ◽  
Automatic Segmentation ◽  
Black Blood ◽  
Manual Segmentation ◽  
Lower Intensity ◽  
Black Blood Mri

AbstractWe present a tool for automatic segmentation of wall enhancement of intracranial aneurysms in black blood MRI. The results of the automatic segmentation with several configurations is compared to manual expert segmentations. While the manual segmentation includes some voxels of lower intensity not present in the automatic segmentation, overall the volume of the automatic segmentation is higher.

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.

scholarly journals High-Resolution Black-Blood MRI of the Carotid Vessel Wall Using Phased-Array Coils at 1.5 and 3 Tesla1

2005 ◽  
Vol 12 (12) ◽  
pp. 1521-1526 ◽  
Author(s):  
SeshaSailaja Anumula ◽  
Hee Kwon Song ◽  
Alexander C. Wright ◽  
Felix W. Wehrli
Keyword(s):  
High Resolution ◽  
Vessel Wall ◽  
Phased Array ◽  
Black Blood ◽  
Black Blood Mri ◽  
Carotid Vessel Wall ◽  
Phased Array Coils ◽  
Array Coils ◽  
Carotid Vessel

Black Blood MRI in Suspected Large Artery Primary Angiitis of the Central Nervous System

2012 ◽  
Vol 23 (3) ◽  
pp. 379-383 ◽  
Author(s):  
Thomas Pfefferkorn ◽  
Jennifer Linn ◽  
Maximilian Habs ◽  
Christina Opherk ◽  
Clemens Cyran ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Black Blood ◽  
Large Artery ◽  
Black Blood Mri ◽  
Primary Angiitis ◽  
The Central Nervous System

Reproducibility and differentiation of cervical arteriopathies using in vivo high-resolution black-blood MRI at 3 T

2016 ◽  
Vol 58 (6) ◽  
pp. 569-576 ◽  
Author(s):  
Florian Schwarz ◽  
Frederik F. Strobl ◽  
Clemens C. Cyran ◽  
Andreas D. Helck ◽  
Martin Hartmann ◽  
...  
Keyword(s):  
High Resolution ◽  
Black Blood ◽  
Black Blood Mri
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