scholarly journals Changes in brain perfusion in successive arterial spin labeling MRI scans in neonates with hypoxic-ischemic encephalopathy

2019 ◽  
Vol 24 ◽  
pp. 101939 ◽  
Author(s):  
Maïa Proisy ◽  
Isabelle Corouge ◽  
Antoine Legouhy ◽  
Amélie Nicolas ◽  
Valérie Charon ◽  
...  
Keyword(s):  
Arterial Spin Labeling ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Hypoxic Ischemic Encephalopathy ◽  
Mri Scans ◽  
Ischemic Encephalopathy

The value of arterial spin labeling imaging in the classification and prognostic evaluation of neonatal hypoxic-ischemic encephalopathy

2021 ◽  
Vol 18 ◽  
Author(s):  
Jianing Wang ◽  
Jia Li ◽  
Xiaoping Yin ◽  
Huan Zhou ◽  
Yating Zheng ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Arterial Spin Labeling ◽  
Poor Prognosis ◽  
Spin Labeling ◽  
Good Prognosis ◽  
Hypoxic Ischemic Encephalopathy ◽  
Clinical Prognosis ◽  
Prognosis Group ◽  
Ischemic Encephalopathy ◽  
Clinical Grading

Objective: This study aims to investigate the correlation between cerebral blood flow (CBF) values and neonatal behavioral neurological assessment (NBNA) in hypoxic-ischemic encephalopathy (HIE), the relationship between early CBF value changes and the prognosis of neonatal HIE, and the consistency between the clinical grading and magnetic resonance (MR) grading of HIE. Methods: Forty neonates with HIE were scanned using the three-dimensional arterial spin labeling (ASL) sequencing of the cranial magnetic resonance imaging (MRI). These newborns were classified as having mild, moderate and severe HIE, according to the clinical grading, and as being normal or having mild, moderate, or severe HIE, according to the MRI grading. Then, the consistency of these two grading systems were compared. Afterwards, the differences in the CBF values of neonates in groups with mild, moderate and severe HIE were compared. In addition, these neonates were grouped according to their NBNA scores. A score of ≥35 was considered a good prognosis, while a score of ≤35 was considered a poor prognosis. The differences in CBF values between these two groups were compared, and the correlation between the CBF values and NBNA scores was determined. Results: There was a strong consistency between the evaluation results for the clinical grading and MR grading (kappa value = 0.672, P<0.001). The differences in CBF values for the basal ganglia (BG) area and thalamus, and the differences in NBNA scores for groups with mild, moderate, or severe HIE were statistically significant (P<0.05). The differences between the poor prognosis group and good prognosis group, in terms of the CBF values for the BG area and thalamus, and the NBNA scores, were statistically significant (P<0.05). The CBF values in the BG region and thalamus were closely and negatively correlated with the NBNA scores. Conclusion: Early CBF values in the BG area and thalamus can objectively and visually reflect the severity of the HIE, and be used to predict the outcome of functional brain damage, allowing early neuroprotective treatment to be initiated. The higher the perfusion in the BG region and thalamus, the lower the NBNA score, and the worse the prognosis would likely be. ASL combined with the NBNA score provides a more comprehensive classification for HIE and a more accurate assessment of the clinical prognosis, providing more medical imaging information for early clinical treatment.

Challenges for Non-Invasive Brain Perfusion Quantification Using Arterial Spin Labeling

2011 ◽  
Vol 24 (1) ◽  
pp. 77-83 ◽  
Author(s):  
I. Sousa ◽  
N. Santos ◽  
J. Sanches ◽  
P. Vilela ◽  
P. Figueiredo
Keyword(s):  
Arterial Spin Labeling ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Non Invasive ◽  
Perfusion Quantification

scholarly journals Effects of Acquisition Parameter Modifications and Field Strength on the Reproducibility of Brain Perfusion Measurements Using Arterial Spin-Labeling

2020 ◽  
Vol 42 (1) ◽  
pp. 109-115
Author(s):  
K.P.A. Baas ◽  
J. Petr ◽  
J.P.A. Kuijer ◽  
A.J. Nederveen ◽  
H.J.M.M. Mutsaerts ◽  
...  
Keyword(s):  
Field Strength ◽  
Arterial Spin Labeling ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Perfusion Measurements

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.

Diagnostic utility of arterial spin labeling in identifying changes in brain perfusion in patients with carbon monoxide poisoning

2020 ◽  
Vol 64 ◽  
pp. 92-96
Author(s):  
Hakan Cebeci ◽  
Mehmet Sedat Durmaz ◽  
Serdar Arslan ◽  
Abdullah Arslan ◽  
Ali Fuat Tekin ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Arterial Spin Labeling ◽  
Carbon Monoxide Poisoning ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Diagnostic Utility

scholarly journals Stability of MR brain-perfusion measurement using arterial spin labeling

2015 ◽  
Vol 2 (S1) ◽  
Author(s):  
Jan Petr ◽  
Frank Hofheinz ◽  
Ivan Platzek ◽  
Georg Schramm ◽  
Jorg Van Den Hoff
Keyword(s):  
Arterial Spin Labeling ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Perfusion Measurement ◽  
Mr Brain

scholarly journals Comparison of cerebral blood flow measurement with [15O]-water positron emission tomography and arterial spin labeling magnetic resonance imaging: A systematic review

2016 ◽  
Vol 36 (5) ◽  
pp. 842-861 ◽  
Author(s):  
Audrey P Fan ◽  
Hesamoddin Jahanian ◽  
Samantha J Holdsworth ◽  
Greg Zaharchuk
Keyword(s):  
Positron Emission Tomography ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Arterial Spin Labeling ◽  
Brain Perfusion ◽  
Spin Labeling ◽  
Emission Tomography ◽  
Flow Measurements ◽  
Arterial Blood ◽  
Positron Emission

Noninvasive imaging of cerebral blood flow provides critical information to understand normal brain physiology as well as to identify and manage patients with neurological disorders. To date, the reference standard for cerebral blood flow measurements is considered to be positron emission tomography using injection of the [15O]-water radiotracer. Although [15O]-water has been used to study brain perfusion under normal and pathological conditions, it is not widely used in clinical settings due to the need for an on-site cyclotron, the invasive nature of arterial blood sampling, and experimental complexity. As an alternative, arterial spin labeling is a promising magnetic resonance imaging technique that magnetically labels arterial blood as it flows into the brain to map cerebral blood flow. As arterial spin labeling becomes more widely adopted in research and clinical settings, efforts have sought to standardize the method and validate its cerebral blood flow values against positron emission tomography-based cerebral blood flow measurements. The purpose of this work is to critically review studies that performed both [15O]-water positron emission tomography and arterial spin labeling to measure brain perfusion, with the aim of better understanding the accuracy and reproducibility of arterial spin labeling relative to the positron emission tomography reference standard.

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