Multiple b value diffusion-weighted MRI of liver: A novel respiratory frequency-modulated continuous-wave radar-trigger technique and comparison with free-breathing technique

IF 2.1 4区医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Magnetic resonance imaging Pub Date : 2024-12-16 DOI:10.1016/j.mri.2024.110312

Kai Liu , Caizhong Chen , Tingting Shen , Xixi Wen , Mengsu Zeng , Pengju Xu

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引用次数: 0

Abstract

Objective

The aim of this study was to evaluate a novel respiratory frequency-modulated continuous-wave radar-trigger (FT) technique for multiple -b-value diffusion-weighted imaging (DWI) of liver and compare it with conventional free breathing (FB) DWI technique.

Material and methods

39 patients with focal liver lesions underwent both frequency-modulated continuous-wave radar-trigger (FT) and conventional free-breathing (FB) multi-b-value diffusion-weighted imaging (DWI,b = 0,50,400,800 s/mm²⁾. Two abdominal radiologists independently assessed the quality of liver DWI images obtained using both techniques, measured and compared liver signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) at different b-values, as well as apparent diffusion coefficient (ADC) values calculated from all b-values.

Results

In terms of image quality, the FT technique is superior to the conventional FB technique, with overall image quality scores (Reader 1, 3.56 ± 0.50 and Reader 2, 3.59 ± 0.55)vs (Reader 1, 2.90 ± 0.75 and Reader 2, 2.97 ± 0.71), respectively. The liver SNR (at b-values of 50,400,and 800 s/mm²) obtained by FT was (138.5 ± 43.48, 96.67 ± 31.95, 71.54 ± 22.03), respectively, which was significantly higher than that obtained by conventional FB (110.90 ± 39.28, 80.86 ± 29.13, 60.43 ± 18.61, P < 0.05). The lesion CNR with FT was significantly higher than that with conventional FB (258.99 ± 151.38 vs 174.60 ± 99.90; 164.56 ± 87.25 vs 111.12 ± 42.43; 118.83 ± 68.76 vs 76.01 ± 35.48, P < 0.001). There was no significant difference in ADC values of liver and lesions between the two techniques: ADCliver-L and ADCliver-R: (FT 1479.3 ± 270.0 vs FB 1529.3 ± 275.5 and FT 1219.6 ± 127.4 vs FB 1248.7 ± 168.2, P > 0.05); ADC lesion:FT(969.0 ± 261.3) vs FB (1017.5 ± 240.4, P > 0.05).

Conclusion

For multi-b-value liver diffusion-weighted imaging, FT technique has higher image quality and better lesion visibility than conventional FB technique and there is no significant difference in ADC values of liver and lesions between the two techniques.

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肝脏多重b值弥散加权MRI：一种新的呼吸调频连续波雷达触发技术及与自由呼吸技术的比较。

目的：研究一种新的呼吸调频连续波雷达触发（FT）技术用于肝脏多b值弥散加权成像（DWI），并与传统自由呼吸（FB） DWI技术进行比较。材料与方法：39例局灶性肝脏病变患者行调频连续波雷达触发（FT）和常规自由呼吸（FB）多b值弥散加权成像（DWI,b = 0,50,400,800 s/mm2）。两名腹部放射科医生独立评估了使用这两种技术获得的肝脏DWI图像的质量，测量并比较了不同b值下肝脏的信噪比（SNR）和噪声对比比（CNR），以及由所有b值计算的表观扩散系数（ADC）值。结果：在图像质量方面，FT技术优于传统FB技术，其总体图像质量得分分别为（Reader 1, 3.56 ± 0.50和Reader 2, 3.59 ± 0.55）vs （Reader 1, 2.90 ± 0.75和Reader 2, 2.97 ± 0.71）。肝脏信噪比(b值的50400年和800年)英国《金融时报》获得的是(138.5 ± 43.48,96.67 ± 31.95,71.54 ± 22.03),分别获得的显著高于传统的FB(110.90 ± 39.28,80.86 ± 29.13,60.43 ± 18.61,P  0.05);ADC病变:英尺(969.0 ±261.3 )和facebook(1017.5 ± 240.4,P > 0.05)。结论：对于多b值肝脏弥散加权成像，FT技术比常规FB技术具有更高的图像质量和更好的病变可见性，两种技术在肝脏和病变的ADC值上无显著差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Magnetic resonance imaging 医学-核医学

CiteScore

4.70

自引率

4.00%

发文量

194

审稿时长

83 days

期刊介绍： Magnetic Resonance Imaging (MRI) is the first international multidisciplinary journal encompassing physical, life, and clinical science investigations as they relate to the development and use of magnetic resonance imaging. MRI is dedicated to both basic research, technological innovation and applications, providing a single forum for communication among radiologists, physicists, chemists, biochemists, biologists, engineers, internists, pathologists, physiologists, computer scientists, and mathematicians.