使用基于深度学习图像重建的单次激发技术在3T场强下对肠道进行快速T2加权磁共振成像：对图像质量和疾病检测的影响
Accelerated T2-weighted MRI of the Bowel at 3T Using a Single-shot Technique with Deep Learning-based Image Reconstruction: Impact on Image Quality and Disease Detection.
作者信息
Dane Bari, Bagga Barun, Bansal Bhavik, Beier Sarah, Kim Sooah, Reddy Arthi, Fenty Felicia, Keerthivasan Mahesh, Chandarana Hersh
机构信息
NYU Langone Health Department of Radiology, 660 1st Avenue, New York, NY 10016 (B.D., B.B., S.B., S.K., A.R., F.F., H.C.); NYU Long Island Department of Radiology, Mineola, NY 11501 (B.D., B.B., B.B., S.B., A.R., F.F., M.K., H.C.).
NYU Langone Health Department of Radiology, 660 1st Avenue, New York, NY 10016 (B.D., B.B., S.B., S.K., A.R., F.F., H.C.); NYU Long Island Department of Radiology, Mineola, NY 11501 (B.D., B.B., B.B., S.B., A.R., F.F., M.K., H.C.).
出版信息
Acad Radiol. 2025 Jan;32(1):210-217. doi: 10.1016/j.acra.2024.08.023. Epub 2024 Aug 27.
RATIONALE AND OBJECTIVE
A single-shot T2-weighted deep-learning-based image reconstruction (DL-HASTE) has been recently developed allowing for shorter acquisition time than conventional half-Fourier acquisition single-shot turbo-spin echo (HASTE). The purpose of this study was to compare image quality of conventional 6 mm HASTE with DL-HASTE at 4 mm and 6 mm slice thickness.
MATERIALS AND METHODS
91 patients (51 female; mean±SD age: 44±10years) who underwent 3T MR enterography from 5/15/2023-7/15/2023 including pelvic conventional HASTE and DL-HASTE were included. Patients either had 4 mm-DL-HASTE or 6 mm-DL-HASTE. Four abdominal radiologists, blinded to sequence type, independently evaluated overall image quality, artifacts over bowel, bowel wall sharpness, and confidence for the presence/absence of bowel abnormalities on 5-point Likert scales. Readers recorded the presence/absence of ileal wall thickening, ileal inflammation, stricture, and penetrating disease on each sequence. Wilcoxon signed-rank test with continuity correction was used for paired comparisons and Wilcoxon rank sum test was used for unpaired ordinal comparisons. A p < .05 indicated statistical significance.
RESULTS
Acquisition times for 6 mm HASTE, 4 mm-DL-HASTE, and 6 mm-DL-HASTE were 64 s, 51 s, and 49 s, respectively. Overall image quality and bowel sharpness were significantly improved for 4 mm-DL-HASTE versus HASTE for 3/4 readers (all p < .05) and similar for the 4th reader (p > .05). Diagnostic confidence was similar for all readers (p > .05). 6 mm-DL-HASTE was similar to HASTE for bowel sharpness, image quality, and confidence for 3/4 readers (all p > .05). The presence of ileal thickening, ileal inflammation, stricture, and penetrating disease were similar for all readers for HASTE, 4 mm-DL-HASTE, and 6 mm-DL-HASTE (all p > .05).
CONCLUSION
4 mm-DL-HASTE had superior image quality than conventional HASTE at shorter acquisition time.
原理与目的
最近开发了一种基于深度学习的单次激发T2加权图像重建技术（DL-HASTE），与传统的半傅里叶采集单次激发涡轮自旋回波（HASTE）相比，采集时间更短。本研究的目的是比较传统6mm HASTE与4mm和6mm层厚的DL-HASTE的图像质量。
材料与方法
纳入2023年5月15日至2023年7月15日期间接受3T MR小肠造影检查的91例患者（51例女性；平均±标准差年龄：44±10岁），检查包括盆腔传统HASTE和DL-HASTE。患者接受的是4mm-DL-HASTE或6mm-DL-HASTE检查。4名腹部放射科医生在不知序列类型的情况下，独立地在5分李克特量表上评估整体图像质量、肠管上的伪影、肠壁清晰度以及对肠管异常存在与否的信心。阅片者记录每个序列上回肠壁增厚、回肠炎症、狭窄和穿透性病变的有无。配对比较采用带连续性校正的Wilcoxon符号秩检验，非配对有序比较采用Wilcoxon秩和检验。p < 0.05表示有统计学意义。
结果
6mm HASTE、4mm-DL-HASTE和6mm-DL-HASTE的采集时间分别为64秒、51秒和49秒。对于3/4的阅片者，4mm-DL-HASTE的整体图像质量和肠管清晰度相对于HASTE有显著改善（所有p < 0.05），第4位阅片者的结果相似（p > 0.05）。所有阅片者的诊断信心相似（p > 0.05）。对于3/4的阅片者，6mm-DL-HASTE在肠管清晰度、图像质量和信心方面与HASTE相似（所有p > 0.05）。对于HASTE、4mm-DL-HASTE和6mm-DL-HASTE，所有阅片者检测到的回肠增厚、回肠炎症、狭窄和穿透性病变的情况相似（所有p > 0.05）。
结论
4mm-DL-HASTE在更短的采集时间内具有比传统HASTE更好的图像质量。
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