Breath-hold diffusion-weighted MR imaging (DWI) using deep learning reconstruction: Comparison with navigator triggered DWI in patients with malignant liver tumors

IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography Pub Date : 2025-01-01 DOI:10.1016/j.radi.2024.11.027

M. Tanabe , M. Higashi , K. Miyoshi , R. Morooka , H. Kiyoyama , K. Ihara , Y. Kawano , M. Yamane , T. Yamaguchi , K. Ito

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引用次数: 0

Abstract

Introduction

This study investigated the feasibility of single breath-hold (BH) diffusion-weighted MR imaging (DWI) using deep learning reconstruction (DLR) compared to navigator triggered (NT) DWI in patients with malignant liver tumors.

Methods

This study included 91 patients who underwent both BH-DWI and NT-DWI with 3T MR system. Abdominal MR images were subjectively analyzed to compare visualization of liver edges, presence of ghosting artifacts, conspicuity of malignant liver tumors, and overall image quality. Then, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and apparent diffusion coefficient (ADC) values of malignant liver tumors were objectively measured using regions of interest.

Results

Image quality except conspicuity of malignant liver tumors were significantly better in BH-DW image than in NT-DW image (p < 0.01). Regarding the conspicuity of malignant liver tumors, there was no statistically significant difference between BH-DWI and NT-DWI (p = 0.67). The conspicuity score of 1 or 2 was rendered in 19 (21 %) patients in NT-DWI group. Conversely, BH-DWI showed a score of 3 or 4 in 11 (58 %) of these 19 patients.

The SNR was significantly higher in BH-DWI than in NT-DWI (29.5 ± 14.0 vs. 27.3 ± 14.7, p < 0.047). No significant difference was observed between CNR and ADC values of malignant liver tumors between BH-DWI and NT-DWI (5.67 ± 3.57 vs. 5.78 ± 3.08, p = 0.243; 997.2 ± 207.0 vs. 1021.0 ± 253.1, p = 0.547).

Conclusion

The BH-DWI using DLR is feasible for liver MRI by improving the SNR and overall image quality, and may play a complementary role to NT-DWI by improving the conspicuity of malignant liver tumor in patients with image distortion in NT-DWI.

Implications for practice

BH-DWI with DLR would be a preferred approach to achieving sufficient image quality in patients with an irregular triggering pattern, as an alternative to NT-DWI. A further reduction in BH duration (<15 s) should be achieved, taking into account patient tolerance.

查看原文本刊更多论文

使用深度学习重建的屏气弥散加权磁共振成像（DWI）：在恶性肝肿瘤患者中与导航仪触发的 DWI 比较。

简介本研究探讨了在恶性肝肿瘤患者中，使用深度学习重建（DLR）的单次屏气（BH）弥散加权磁共振成像（DWI）与导航仪触发（NT）DWI相比的可行性：本研究纳入了91名使用3T磁共振系统接受BH-DWI和NT-DWI检查的患者。对腹部磁共振图像进行主观分析，比较肝脏边缘的可视性、重影伪影的存在、肝脏恶性肿瘤的明显性和整体图像质量。然后，利用感兴趣区对恶性肝肿瘤的信噪比（SNR）、对比度-噪声比（CNR）和表观弥散系数（ADC）值进行客观测量：结果：BH-DW 图像的图像质量（除恶性肝肿瘤的明显性外）明显优于 NT-DW 图像（p 结论：BH-DWI 图像的图像质量（除恶性肝肿瘤的明显性外）明显优于 NT-DW 图像：使用DLR的BH-DWI改善了信噪比和整体图像质量，因此在肝脏磁共振成像中是可行的，并且可以改善NT-DWI图像失真的患者肝脏恶性肿瘤的清晰度，从而对NT-DWI起到补充作用：对于触发模式不规则的患者，BH-DWI 和 DLR 是获得足够图像质量的首选方法，可替代 NT-DWI。进一步缩短 BH 持续时间 (

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来源期刊

Radiography RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

4.70

自引率

34.60%

发文量

169

审稿时长

63 days

期刊介绍： Radiography is an International, English language, peer-reviewed journal of diagnostic imaging and radiation therapy. Radiography is the official professional journal of the College of Radiographers and is published quarterly. Radiography aims to publish the highest quality material, both clinical and scientific, on all aspects of diagnostic imaging and radiation therapy and oncology.