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• Special Focus •
Clinical feasibility of breath-hold fat-suppressed T2-weighted sequence with deep learning reconstruction for liver imaging
FANG Shu  WU Mengxiong  CHEN Qian  LIU Fangtao  DONG Haipeng  FU Guifeng  YAN Fuhua  LIN Huimin 

Cite this article as: FANG S, WU M X, CHEN Q, et al. Clinical feasibility of breath-hold fat-suppressed T2-weighted sequence with deep learning reconstruction for liver imaging[J]. Chin J Magn Reson Imaging, 2023, 14(5): 31-35, 40. DOI:10.12015/issn.1674-8034.2023.05.007.


[Abstract] Objective To assess the feasibility of the breath-hold fat-suppressed T2-weighted sequence with deep learning reconstruction technique (BH fs T2 DLR) and compare its image quality and acquisition time with those of the respiratory-gated propeller fat-saturated T2-weighted sequence (RTr fs T2 Propeller).Materials and Methods A total of 46 patients who underwent liver MRI in our hospital (23 patients with hepatic lesions and 23 without obvious lesions) were prospectively enrolled in this study from January to June 2022. Two sequences of BH fs T2 DLR and RTr fs T2 Propeller were performed with a 3.0 T scanner. Qualitative image quality was evaluated using a 5-point Likert scale. Quantitative image quality parameters included signal-to-noise ratio (SNR), lesion to liver contrast-to-noise ratio (CNR_Lesion) for patients with liver lesions, and spleen to liver contrast-to-noise ratio (CNR_Spleen) for patients without liver lesions. Wilcoxon matched-pairs signed-ranks test was performed for comparison analysis at a significance level of P＜0.05.Results BH fs T2 DLR showed significantly shorter scan time (38 s vs. 162 s, P＜0.01). BH fs T2 DLR sequence achieved higher scores for all qualitative image quality parameters (P＜0.01). BH fs T2 DLR also showed significantly higher SNR [290.30 (220.63, 383.80)] vs. [166.85 (131.40, 224.83)], CNR_Lesion [602.60 (372.40, 708.50)] vs. [259.20 (217.90, 367.90)] and CNR_Spleen [267.70 (146.70, 432.80)] vs. [206.20 (104.40, 293.70)] than RTr fs T2 Propeller, respectively (P＜0.01).Conclusions The BH fs T2 DLR sequence can provide improved image quality and simultaneously significant reduction in scanning time, and may replace the RTr fs T2 Propeller sequence in certain scenarios, as a promising alternative in clinical practice.
[Keywords] liver；magnetic resonance imaging；T2 weighted imaging；deep learning

FANG Shu   WU Mengxiong   CHEN Qian   LIU Fangtao   DONG Haipeng   FU Guifeng   YAN Fuhua   LIN Huimin*  

Department of Radiology, Ruijin Hospital, Shanghai Jiaotong University of Medicine, Shanghai 200025, China

Corresponding author: Lin HM, E-mail: lhm12362@rjh.com.cn

Conflicts of interest   None.

Received  2023-02-10
Accepted  2023-05-06
DOI: 10.12015/issn.1674-8034.2023.05.007
Cite this article as: FANG S, WU M X, CHEN Q, et al. Clinical feasibility of breath-hold fat-suppressed T2-weighted sequence with deep learning reconstruction for liver imaging[J]. Chin J Magn Reson Imaging, 2023, 14(5): 31-35, 40. DOI:10.12015/issn.1674-8034.2023.05.007.

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