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• Technical Article •
Simultaneous multi-slice accelerated turbo spin echo imaging for the thigh muscle-an image quality analysis
LIU Dong  WANG Fengdan  KONG Lingyan  HOU Bo  ZHANG Yan  XUE Huadan  FENG Feng  JIN Zhengyu 

Cite this article as: Liu D, Wang FD, Kong LY, et al. Simultaneous multi-slice accelerated turbo spin echo imaging for the thigh muscle-an image quality analysis[J]. Chin J Magn Reson Imaging, 2021, 12(3): 59-62, 66. DOI:10.12015/issn.1674-8034.2021.03.013.


[Abstract] Objective To investigate the image quality of simultaneous multi-slice (SMS) accelerated fat-saturated (FS) T2WI turbo spin echo (TSE) magnetic resonance imaging protocol on the thigh muscle in comparison with parallel acquisition technique (PAT) accelerated FS T2WI TSE protocol. Materials andMethods Twenty-seven subjects (19 healthy volunteers and 8 patients indicated for MRI examination for thigh muscle) were included in the research in total. All subjects were scanned using a 3.0 tesla MRI. Axial SMS accelerated FS T2WI TSE images and PAT accelerated FS T2WI TSE images of the thigh muscle were acquired for all the subjects. The scan time was 1 minute 20 seconds for SMS accelerated FS T2WI TSE image and 2 minutes 28 seconds for PAT accelerated FS T2WI TSE imaging respectively. Images were transferred to the workstation for further measurement. Signal intensity (SI) and noise (standard deviation, SD) of thigh muscle were measured on the same slice of two image sequences with SMS or PAT technique. The ROIs were located at the right medial vastus muscles, with an area of 1 cm2. Signal to noise ratio (SNR) was calculated accordingly. Subjective image quality was evaluated by 2 experienced radiologists independently using a 5-point scale. Paired student's t-test was used to compare the SD and SNR for the two groups of images. Wilcoxon signed ranks test was used to compare the subjective scores between the two groups. Statistically difference was considered while P＜0.05. The accordance between two different observers was investigated at the mean time. ICC values of more than 0.6 were considered good accordance between the two observers.Results SMS accelerated FS T2WI TSE images showed significantly lower noises in comparison with PAT accelerated FS T2WI TSE images [(1.37±0.25) vs. (1.57±0.33); P=0.032]. There was no significant difference in SNR between two groups [(41.50±15.75) vs. (46.23±10.89); P=0.085]. The subjective image quality was of no significant difference by both of the two observers. Observer 1: [(3.81±0.68) vs. (3.93±0.50); P=0.317]; Observer 2: [(3.85±0.53) vs. (3.78±0.64); P=0.527]. Both groups of images showed good inter-observer accordance (SMS accelerated TSE images: ICC=0.75, conventional TSE images. ICC=0.782).Conclusions By using a SMS accelerated FS T2WI TSE scan protocol in the imaging of the thigh muscle, compared with PAT accelerated FS T2WI TSE scan protocol, the acquisition time is reduced while the image quality remains similar.
[Keywords] magnetic resonance imaging；simultaneous multi-slice；parallel acquisition technique；thigh；muscle；image quality

LIU Dong   WANG Fengdan*   KONG Lingyan   HOU Bo   ZHANG Yan   XUE Huadan   FENG Feng   JIN Zhengyu  

Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Beijing 100730, China

Wang FD, E-mail:wangfengdan@pumch.cn

Conflicts of interest   None.

ACKNOWLEDGMENTS  The Specialized Supporting Fund of Beijing for Young Excellent Talents No. 2018 Chinese National Public Welfare Basic Scientific Research Program of Chinese Academy of Medical Sciences No. 2017PT32004
Received  2020-11-19
Accepted  2021-01-21
DOI: 10.12015/issn.1674-8034.2021.03.013
Cite this article as: Liu D, Wang FD, Kong LY, et al. Simultaneous multi-slice accelerated turbo spin echo imaging for the thigh muscle-an image quality analysis[J]. Chin J Magn Reson Imaging, 2021, 12(3): 59-62, 66. DOI:10.12015/issn.1674-8034.2021.03.013.

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