scholarly journals Subminute Fat-Water-Separated Dual-Echo Automated Spine Survey Iterative Scan Technique

2009 ◽  
Vol 30 (10) ◽  
pp. 1840-1846 ◽  
Author(s):  
K.L. Weiss ◽  
C.R. Richards ◽  
D. Sun ◽  
J.L. Weiss
Keyword(s):  
Dual Echo

scholarly journals Detection of Acute Cerebral Infarction by Dual Echo Subtraction Technique in MR Imaging

2003 ◽  
Vol 59 (5) ◽  
pp. 656-662
Author(s):  
KENGO HARADA ◽  
EIJI NISHIMARU ◽  
TAKEHARU YUKUTOMO ◽  
TAKAYUKI ISHIDA
Keyword(s):  
Mr Imaging ◽  
Cerebral Infarction ◽  
Acute Cerebral Infarction ◽  
Subtraction Technique ◽  
Dual Echo

Case 1.7

2014 ◽  
pp. 13-14
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Signal Intensity ◽  
High Signal Intensity ◽  
High Signal ◽  
Signal Loss ◽  
Quadrant Pain ◽  
Hepatic Lobe ◽  
P 75 ◽  
The Right ◽  
Dual Echo ◽  
Delayed Phase

75-year-old man with right upper quadrant pain Axial fat-suppressed dual echo FSE T2-weighted images (Figure 1.7.1) reveal a lobulated mass in the right hepatic lobe with diffuse high signal intensity. Note that on the dual echo images, there is little signal loss between the first (TE, 80 ms) and second (TE, 160 ms) echoes. Axial arterial, portal venous, equilibrium, and 5-minute delayed phase postgadolinium 3D SPGR images (...

scholarly journals Improved volumetric myelin imaging in human brain using 3D dual echo inversion recovery‐prepared UTE with complex echo subtraction

2019 ◽  
Vol 83 (4) ◽  
pp. 1168-1177 ◽  
Author(s):  
Hyungseok Jang ◽  
Zhao Wei ◽  
Mei Wu ◽  
Ya‐Jun Ma ◽  
Eric Y. Chang ◽  
...  
Keyword(s):  
Human Brain ◽  
Inversion Recovery ◽  
Myelin Imaging ◽  
Dual Echo

scholarly journals Dual-Echo Arterial Spin Labeling for Brain Perfusion Quantification and Functional Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
André Monteiro Paschoal ◽  
Fernando Fernandes Paiva ◽  
Renata Ferranti Leoni
Keyword(s):  
Arterial Spin Labeling ◽  
Pulse Sequence ◽  
Brain Connectivity ◽  
Motor Task ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Blood Oxygenation ◽  
Specific Response ◽  
Bivariate Correlation ◽  
Dual Echo

Arterial Spin Labeling (ASL) is a noninvasive MRI-based method to measure cerebral blood flow (CBF). Recently, the study of ASL as a functional tool has emerged once CBF fluctuation comes from capillaries in brain tissue, giving a more spatially specific response when compared to the standard functional MRI method, based on the blood oxygenation level-dependent (BOLD) contrast. Although the BOLD effect could be desirable to study brain function, if one aims to quantify CBF, such effect is considered contamination that can be more attenuated if short TE value is used in the image acquisition. An approach that provides both CBF and function information in a simultaneous acquisition is the use of a dual-echo ASL (DE-ASL) readout. Our purpose was to evaluate the information provided by DE-ASL regarding CBF quantification and functional connectivity with a motor task. Pseudocontinuous ASL of twenty healthy subjects (age: 32.4 ± 10.2 years, 13 male) was acquired at a 3T scanner. We analyzed the influence of TE on CBF values and brain connectivity provided by CBF and concurrent BOLD (cc-BOLD) time series. Brain networks were obtained by the general linear model and independent component analysis. Connectivity matrices were generated using a bivariate correlation (Fisher Z values). No effect of the sequence readout, but significant effect of the TE value, was observed on gray matter CBF values. Motor networks with reduced extension and more connections with important regions for brain integration were observed for CBF data acquired with short TE, proving its higher spatial specificity. Therefore, it was possible to use a dual-echo readout provided by a standard commercial ASL pulse sequence to obtain reliable quantitative CBF values and functional information simultaneously.

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