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• Clinical Article •
Application of compressed sensing combined with EPI-ASL technology in ischemic stroke
SUN Meirong  SU Chunqiu  BIAN Hongli  ZHAO Xiance  JIN Dongsheng  LU Shanshan 

Cite this article as: SUN M R, SU C Q, BIAN H L, et al. Application of compressed sensing combined with EPI-ASL technology in ischemic stroke[J]. Chin J Magn Reson Imaging, 2023, 14(11): 18-24. DOI:10.12015/issn.1674-8034.2023.11.004.


[Abstract] Objective To investigate the clinical utility of compressed sensing (CS) combined with echo-planar-imaging (EPI) arterial spin labeling (EPIC-ASL) in improving cerebral perfusion imaging, by compared with traditional EPI-ASL images.Materials and Methods We prospectively enrolled 26 patients with acute cerebral infarction (ACI) and 32 healthy volunteers. They were scanned both EPI-ASL and EPIC-ASL program. Two radiologists independently evaluated the imaging quality of the white matter, gray matter, basal ganglia, brainstem and cerebellum acquired by EPIC-ASL and EPI-ASL, respectively. Then, the signal to noise ratio (SNR) and gray/white matter contrast noise ratio (CNR) were caculated in each anatomical region same as above. For patients with ACI, the boundary of infarction, SNR, CNR infarction/white matter, and relative blood flow (rCBF) were analyzed. The paired-sample t-test, Wilcoxon rank sum test, and Mann-Whitney U test were used in appropriate to compare the image quality between the two groups.Results EPIC-ASL performed better than EPI-ASL for displaying white matter, gray matter, basal ganglia, brainstem and cerebellum, (all P＜0.001). In each anatomical location, the SNR and CNRgray matter/white matter of EPIC-ASL were all considerably higher than those of EPI-ASL (all P＜0.001). Compared with EPI-ASL, EPIC-ASL could depict the boundaries of infarct more accurately (P＜0.001) and showed higher SNR and CNRinfarction/white Matter values (P＜0.001 and P＜0.032, respectively). There was no significant difference in the evaluation of rCBF between the two techniques (P=0.851).Conclusions Within the same scanning time, EPIC-ASL can improve the in-plane resolution and image quality compared with traditional EPI-ASL. EPIC-ASL shows better performance for the visualization of infarction, and can accurately assess cerebral perfusion, which will be benefit for patients with ACI.
[Keywords] ischemic stroke；cerebral perfusion；compressed sensing；arterial spin labeling；magnetic resonance imaging

SUN Meirong1, 2   SU Chunqiu1   BIAN Hongli1   ZHAO Xiance3   JIN Dongsheng2   LU Shanshan1*  

1 Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China

2 Department of Radiology, Jiangsu Province Offical Hospital, Nanjing 210024, China

3 Philips (China) Investment Company, Shanghai 200042, China

Corresponding author: LU S S, E-mail: lushan1118@163.com

Conflicts of interest   None.

ACKNOWLEDGMENTS National Natural Science Foundation of China (No. 82171907).
Received  2023-05-27
Accepted  2023-10-27
DOI: 10.12015/issn.1674-8034.2023.11.004
Cite this article as: SUN M R, SU C Q, BIAN H L, et al. Application of compressed sensing combined with EPI-ASL technology in ischemic stroke[J]. Chin J Magn Reson Imaging, 2023, 14(11): 18-24. DOI:10.12015/issn.1674-8034.2023.11.004.

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