Differentiation of symptomatic and asymptomatic carotid intraplaque hemorrhage using 3D high‐resolution diffusion‐weighted stack of stars imaging

2021 ◽  
Author(s):  
Seong‐Eun Kim ◽  
Dennis L. Parker ◽  
John A. Roberts ◽  
Gerald S. Treiman ◽  
Matthew Alexander ◽  
...  
Keyword(s):  
High Resolution ◽  
Intraplaque Hemorrhage ◽  
Asymptomatic Carotid ◽  
Diffusion Weighted ◽  
Stack Of Stars

Rapid high-resolution volumetric T1 mapping using a highly accelerated stack-of-stars Look Locker technique

2021 ◽  
Author(s):  
Zhitao Li ◽  
Zhiyang Fu ◽  
Mahesh Keerthivasan ◽  
Ali Bilgin ◽  
Kevin Johnson ◽  
...  
Keyword(s):  
High Resolution ◽  
T1 Mapping ◽  
Stack Of Stars

Characterization of symptomatic and asymptomatic carotid plaques using high-resolution real-time ultrasonography

1993 ◽  
Vol 80 (10) ◽  
pp. 1274-1277 ◽  
Author(s):  
G. Geroulakos ◽  
G. Ramaswami ◽  
A. Nicolaides ◽  
K. James ◽  
N. Labropoulos ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Asymptomatic Carotid ◽  
Carotid Plaques ◽  
Real Time Ultrasonography

Abstract TP400: The Differences of Vessel Wall Features Between the Anterior and Posterior Brain Arteries Detected by High Resolution Magnetic Resonance Imaging in Patients With Acute Ischemic Stroke

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Xiangyan Chen ◽  
Lu Zheng ◽  
Jia LI ◽  
Wenjie Yang
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Acute Ischemic Stroke ◽  
Vessel Wall ◽  
Posterior Circulation ◽  
Intraplaque Hemorrhage ◽  
Resonance Imaging ◽  
Anterior Circulation

Backgrounds: The purpose of this study was to investigate vessel wall features visualization by high resolution magnetic resonance imaging (HRMRI) in a series of ischemic stroke patients and to identify differences between lesions in the anterior and posterior circulation. Methods: We consecutively recruited Chinese patients with acute ischemic stroke or transient ischemic attack from 2016 to 2018. All patients were scanned at 3T magnetic resonance imaging. We evaluated pre-and post-contrast cross-sectional views of M1 and M2 segments of middle cerebral arteries (MCAs), basilar arteries (BA) and V4 segments of vertebral arteries (VAs). Results: A total of 74 patients (males 52.3%; median age 62 years old) were included in this study, among which, 234 lesions were identified on HRMRI, including 117 MCA lesions, 26 BA lesions, and 91 VA lesions. The sensitivity and specificity of MRA for diagnosing stenosis in anterior circulation were 89.3% (95% CI, 81.8%- 94.2%) and 50.0 (95% CI, 9.2%- 90.8%). The sensitivity and specificity of MRA for diagnosing stenosis in posterior circulation were 73.2% (95% CI, 63.9%- 80.9%) and 40.0 (95% CI, 7.3%- 83.0%). VA had a significantly higher contrast enhancement index (43.71± 7.74, p <0.016) than MCA (23.32± 2.46) or BA (22.69± 5.31) . Anterior circulation plaques had higher degree of stenosis (anterior versus posterior: 68.5% vs. 62.9%, p =0.036), more eccentric distribution (anterior versus posterior: 70.1% versus 53.8%, p =0.015) and higher rate of intraplaque hemorrhage (anterior versus posterior: 17.1% versus 7.7%, p =0.046). The plaques in posterior circulation had a thicker lesion wall (posterior versus anterior 16.58± 8.25 mm 2 vs. 9.10± 4.07 mm 2 , p <0.001) and higher enhancement index (posterior versus anterior 39.04± 8.50 vs. 23.32± 2.46, p <0.001) than the plaques in anterior circulation. Conclusions: The lesions in posterior circulations could be obscure on MRA. The area stenosis, intraplaque hemorrhage and enhancement index differed between circulations.

High Resolution Diffusion-Weighted Imaging for Solitary Orbital Tumors

2017 ◽  
Vol 28 (2) ◽  
pp. 261-266 ◽  
Author(s):  
Akio Hiwatashi ◽  
Osamu Togao ◽  
Koji Yamashita ◽  
Kazufumi Kikuchi ◽  
Hiroshi Yoshikawa ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffusion Weighted Imaging ◽  
Orbital Tumors ◽  
Diffusion Weighted

scholarly journals High‐resolution diffusion‐weighted imaging identifies ischemic lesions in a majority of transient ischemic attack patients

2019 ◽  
Vol 86 (3) ◽  
pp. 452-457 ◽  
Author(s):  
Benjamin Hotter ◽  
Ivana Galinovic ◽  
Claudia Kunze ◽  
Peter Brunecker ◽  
Gerhard J. Jungehulsing ◽  
...  
Keyword(s):  
High Resolution ◽  
Transient Ischemic Attack ◽  
Diffusion Weighted Imaging ◽  
Diffusion Weighted ◽  
Ischemic Attack

scholarly journals Association between basilar artery configuration and Vessel Wall features: a prospective high-resolution magnetic resonance imaging study

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Ziqi Xu ◽  
Mingyao Li ◽  
Zhikai Hou ◽  
Jinhao Lyu ◽  
Na Zhang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Blood Vessel ◽  
Basilar Artery ◽  
Vessel Wall ◽  
Intraplaque Hemorrhage ◽  
Blood Vessel Wall ◽  
Resonance Imaging ◽  
The Relationship

Abstract Background The relationship between intracranial vessel configuration and wall features remains poorly investigated. Therefore, we aimed to investigate the relationship between the distal and proximal anatomical configuration of basilar artery (BA) and BA vessel wall features on high-resolution magnetic resonance imaging (HRMRI). Methods From September 2014 to January 2017, patients with suspected symptomatic intracranial arterial stenosis underwent HRMRI. Patients with severe BA stenosis were selected for this prospective study and divided into two groups corresponding to complete and incomplete BA configuration based on characteristics of the bilateral vertebral arteries and posterior cerebral arteries. Culprit blood vessel wall features on HRMRI included plaque enhancement, intraplaque hemorrhage, remodeling patterns, and plaque distribution. Culprit vessel wall features were compared between patients in the complete and incomplete BA configuration groups. Results Among the 298 consecutively enrolled patients, 34 had severe BA stenosis. Twenty patients had complete anatomical BA configuration and another 14 of them displayed incomplete configuration. There were no significant differences in vessel wall features between the complete and incomplete configuration patient groups. However, the proximal configuration of BA was associated with intraplaque hemorrhage (p = 0.002) while the distal configuration of BA correlated with strong enhancement of BA plaque (p = 0.041). Conclusions No association was found between the complete and incomplete BA configuration groups and blood vessel wall features. The proximal configuration of BA was related with intraplaque hemorrhage and the distal configuration of BA was associated with strong plaque enhancement. Further studies are warranted to confirm these findings. Trial registration URL: Unique identifier: NCT02705599 (March 10, 2016).

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