Detection of pericardial flow in black blood-prepared T2 HASTE sequence imaging: Differentiation between pericardial diverticulum and cyst

Abstract Background Coronavirus disease 2019 (COVID-19) induces myocardial injury, either direct myocarditis or indirect injury due to systemic inflammatory response. Myocardial involvement has been proved to be one of the primary manifestations of COVID-19 infection, according to laboratory test, autopsy, and cardiovascular magnetic resonance (CMR). However, the middle-term outcome of cardiac involvement after the patients were discharged from the hospital is yet unknown. The present study aimed to evaluate mid-term cardiac sequelae in recovered COVID-19 patients by CMR Methods A total of 47 recovered COVID-19 patients were prospectively recruited and underwent CMR examination. The CMR protocol consisted of black blood fat-suppressed T2 weighted imaging, T2 star mapping, left ventricle (LV) cine imaging, pre- and post-contrast T1 mapping, and late gadolinium enhancement (LGE). LGE were assessed in mixed both recovered COVID-19 patients and healthy controls. The LV and right ventricle (RV) function and LV mass were assessed and compared with healthy controls. Results A total of 44 recovered COVID-19 patients and 31 healthy controls were studied. LGE was found in 13 (30%) of COVID-19 patients. All LGE lesions were located in the mid myocardium and/or sub-epicardium with a scattered distribution. Further analysis showed that LGE-positive patients had significantly decreased LV peak global circumferential strain (GCS), RV peak GCS, RV peak global longitudinal strain (GLS) as compared to non-LGE patients (p < 0.05), while no difference was found between the non-LGE patients and healthy controls. Conclusion Myocardium injury existed in 30% of COVID-19 patients. These patients have depressed LV GCS and peak RV strains at the 3-month follow-up. CMR can monitor the COVID-19-induced myocarditis progression, and CMR strain analysis is a sensitive tool to evaluate the recovery of LV and RV dysfunction.

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Associations between haemodynamics and wall enhancement of intracranial aneurysm

Stroke and Vascular Neurology ◽

10.1136/svn-2020-000636 ◽

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

Academic Radiology ◽

10.1016/j.acra.2005.08.009 ◽

2005 ◽

Vol 12 (12) ◽

pp. 1521-1526 ◽

Cited By ~ 23

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

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Editorial for “ Pseudo‐Enhancement in Intracranial Aneurysms on Black Blood MRI : Effects of Flow Rate, Spatial Resolution, and Additional Flow Suppression”

Journal of Magnetic Resonance Imaging ◽

10.1002/jmri.27627 ◽

2021 ◽

Author(s):

Jean‐Pierre Laissy

Keyword(s):

Spatial Resolution ◽

Flow Rate ◽

Intracranial Aneurysms ◽

Black Blood ◽

Black Blood Mri

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Visualization of the lenticulostriate artery with flow-sensitive black-blood acquisition in comparison with time-of-flight MR angiography

Journal of Magnetic Resonance Imaging ◽

10.1002/jmri.21626 ◽

2009 ◽

Vol 29 (1) ◽

pp. 65-69 ◽

Cited By ~ 16

Author(s):

Kimio Gotoh ◽

Tomohisa Okada ◽

Yukio Miki ◽

Masato Ikedo ◽

Ayako Ninomiya ◽

...

Keyword(s):

Mr Angiography ◽

Time Of Flight ◽

Black Blood ◽

Lenticulostriate Artery

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Black Blood, White Roses: Apocalypse and Redemption in Blok’s Later Poetry

Shapes of Apocalypse ◽

10.1515/9781618116956-010 ◽

2019 ◽

pp. 134-152

Keyword(s):

Black Blood

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Carotid wall imaging with 3D_T2_FFE: sequence parameter optimization and comparison with 3D_T2_SPACE

Scientific Reports ◽

10.1038/s41598-021-81309-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ang Yang ◽

Xue Hong Xiao ◽

Zhi Long Wang ◽

Yong Xin Zhang ◽

Ke Yi Wang

Keyword(s):

Cerebellopontine Angle ◽

Carotid Bifurcation ◽

Black Blood ◽

Residual Flow ◽

Flow Signal ◽

Good Imaging ◽

Significant Difference ◽

Carotid Wall ◽

Fast Field ◽

Wall Imaging

AbstractSimilar to sampling perfection with application-optimized contrast using different flip angle evolutions (SPACE), T2-weighted fast field echo (FFE) also has a black blood effect and a high imaging efficiency. The purpose of this study was to optimize 3D_T2_FFE and compare it with 3D_T2_SPACE for carotid imaging. The scanning parameter of 3D_T2_FFE was optimized for the imaging of the carotid wall. Twenty healthy volunteers and 10 patients with carotid plaque underwent cervical 3D_T2_FFE and 3D_T2_SPACE examinations. The signal-to-noise ratios of the carotid wall (SNRwall) and lumen (SNRlumen), and the contrast-to-noise ratios between the wall and lumen (CNRwall_lumen) were compared. The incidence of the residual flow signal at the carotid bifurcation and the grades of flow voids in the cerebellopontine angle region in the two sequences were also compared. The reproducibility of the two sequences was tested. No significant difference was observed between the two sequences in terms of the SNRwall of healthy individuals and patients (P = 0.132 and 0.102, respectively). The SNRlumen in the 3D_T2_FFE images was lower than that in the 3D_T2_SPACE images. No significant difference was observed between the two sequences in terms of the CNRwall-lumen. The incidence of the residual flow signal at the carotid bifurcation in 3D_T2_FFE was significantly lower than that in 3D_T2_SPACE. The grades of flow suppression in the cerebellopontine angle region in 3D_T2_SPACE was lower than that in 3D_T2_FFE. Both sequences showed excellent inter-and intra-observer reproducibility. Compared to 3D_T2_SPACE, 3D_T2_FFE showed stronger flow suppression while maintaining good imaging quality, which can be used as an alternative tool for carotid imaging.

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