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• Technical Article •
An imaging study of three-dimensional simultaneous non-contrast angiography and intraplaque hemorrhage of whole brain based on compressed sensing
ZHANG Yukun  ZHANG Haonan  CHANG Peipei  LIU Na  LUO Hedan  HU Shuai  WANG Nan  SONG Qingwei  MIAO Yanwei 

Cite this article as: Zhang YK, Zhang HN, Chang PP, et al. An imaging study of three-dimensional simultaneous non-contrast angiography and intraplaque hemorrhage of whole brain based on compressed sensing[J]. Chin J Magn Reson Imaging, 2022, 13(12): 124-129. DOI:10.12015/issn.1674-8034.2022.12.021.


[Abstract] Objective To optimize three-dimensional simultaneous non-contrast angiography and intraplaque hemorrhage (3D SNAP) based on compressed sensing (CS 3D SNAP), we performed different acceleration factors (AF) to obtain high-quality magnetic resonance angiography (MRA) and vascular wall images capable of whole brain coverage in a short time.Material and Methods: Thirty healthy volunteers were prospectively recruited in this study. Ten volunteers were performed the pre-scan for selecting a precise head three-dimensional simultaneous non-contrast angiography and intraplaque hemorrhage (3D SNAP) parameter. Twenty volunteers were scanned with conventional 3D SNAP and CS 3D SNAP (AF=2, 2.5, 3, 4, or 5) on the basis of the optimized pre-scan sequence. Two radiologists delineated the region of interest of vascular lumen, vascular wall, and adjacent white matter on the original images, then measured the signal intensity and the standard deviation. The signal to noise ratio (SNR) and the contrast to noise ratio (CNR) of vascular lumen, the contrast-to-tissue ratio (CTR) and the CTR efficiency (CTReff) of the vascular wall were further calculated. The image quality of each dataset were scored subjectively by two radiologists. The consistency of measurements and subjective scores of the two observers were analyzed using Kappa and intra-class correlation coefficient (ICC) test. Compare and analyze the differences in measurement parameters and subjective scores between different AF.Results The measured data and subjective scores of the two observers were in good consistent (Kappa: 0.568-0.884, ICC: 0.602-0.968). When CS AF is greater than or equal to 4, the SNR, CNR of vascular lumen and subjective scores were significantly different from those of conventional 3D SNAP (P＜0.05). When CS AF is equal to 2.5, 3, 4, or 5, the CTReff of vascular wall were significantly different compared with conventional 3D SNAP (P＜0.05).Conclusions 3D CS SNAP can obtain whole cerebrovascular MRA and vascular wall images in a relatively short period of time, and a single scan provides diagnostic information on both vascular morphology and plaque in the vessel wall. AF of 2 is recommended for mild and moderate disease patients and AF of 3 is recommended for critical patients.
[Keywords] magnetic resonance imaging；compressed sensing；three-dimensional simultaneous non-contrast angiography and intraplaque hemorrhage；intraplaque hemorrhage；magnetic resonance angiography；high resolution vessel wall magnetic resonance imaging

ZHANG Yukun   ZHANG Haonan   CHANG Peipei   LIU Na   LUO Hedan   HU Shuai   WANG Nan   SONG Qingwei   MIAO Yanwei*  

Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

Miao YW, E-mail: ywmiao716@163.com

Conflicts of interest   None.

ACKNOWLEDGMENTS Fund Plan of the Dalian Science and Technology Innovation (No. 2020JJ7SN075).
Received  2022-05-16
Accepted  2022-11-29
DOI: 10.12015/issn.1674-8034.2022.12.021
Cite this article as: Zhang YK, Zhang HN, Chang PP, et al. An imaging study of three-dimensional simultaneous non-contrast angiography and intraplaque hemorrhage of whole brain based on compressed sensing[J]. Chin J Magn Reson Imaging, 2022, 13(12): 124-129. DOI:10.12015/issn.1674-8034.2022.12.021.

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