Application value of MR nonenhanced brain neurovascular sequences in evaluating neonatal arterial ischemic stroke
10.3969/j.issn.1002-1671.2024.06.023
- VernacularTitle:基于MR非增强头颅神经血管序列评估新生儿动脉缺血性脑卒中的应用价值
- Author:
Di HU
1
;
Huanyu LUO
;
Hang LI
;
Shuangfeng YANG
;
Yun PENG
Author Information
1. 国家儿童医学中心 首都医科大学附属北京儿童医院影像中心,北京 100045
- Keywords:
newborn;
arterial ischemic stroke;
susceptibility weighted imaging;
magnetic resonance angiography
- From:
Journal of Practical Radiology
2024;40(6):961-965
- CountryChina
- Language:Chinese
-
Abstract:
Objective To systematically evaluate brain parenchymal and vascular changes after neonatal arterial ischaemic stroke(AIS)using nonenhanced brain neurovascular MR sequences.Methods MR imaging data of 57 children with AIS(＜28 days old at the time of diagnosis)were analyzed retrospectively,including[susceptibility weighted imaging(SWI),magnetic resonance angiography(MRA),magnetic resonance venography(MRV)]sequences and conventional brain sequences[T1 WI,T2 WI,diffusion weighted imaging(DWI)].The imaging features and alteration trend of different sequences in different periods were summarized and studied.Results Vessels increased or decreased in number and enlarged or reduced in diameter within the infarction area,which presented a mixed-pattern,while the periphery showed increased only by using the nonenhanced brain vascular sequence.During the first 9 days after the onset of symptoms,the signals of T1 WI and T2 WI within the infarction area gradually stabilized,and most signals of DWI returned to normal.MRA,MRV,and SWI sequences showed a minimal change of diameter and number of vessels within the infarction area and its surroundings,which directed that neonatal AIS may had transient and dramatic brain injury and blood flow alteration.Conclusion The nonenhanced neurovascular sequence of brain MR can comprehensively display the alteration of brain parenchymal signals and vascular trends after neonatal AIS,providing the possibility for early clinical rapid and effective evaluation.
