Breath-hold High-resolution T1-weighted Gradient Echo Liver MR Imaging with Compressed Sensing Obtained during the Gadoxetic Acid-enhanced Hepatobiliary Phase: Image Quality and Lesion Visibility Compared with a Standard T1-weighted Sequence.

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-04-01 Epub Date: 2023-02-04 DOI:10.2463/mrms.mp.2022-0137
Kenichiro Ihara, Hideko Onoda, Masahiro Tanabe, Etsushi Iida, Takaaki Ueda, Taiga Kobayashi, Mayumi Higashi, Marcel Dominik Nickel, Hiroshi Imai, Katsuyoshi Ito
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Abstract

Purpose: To evaluate the feasibility of breath-hold (BH) high-resolution (HR) T1-weighted gradient echo hepatobiliary phase (HBP) imaging using compressed sensing (CS) in gadoxetic acid-enhanced liver MRI in comparison with standard HBP imaging using parallel imaging (PI).

Methods: The study included 122 patients with liver tumors with hypointensity in the HBP who underwent both HR HBP imaging with CS and standard HBP imaging with PI. Two radiologists evaluated the liver edge sharpness, hepatic vessel conspicuity, bile duct conspicuity, image noise, and overall image quality, as well as the lesion conspicuity on HR and standard HBP imaging and the contrast-enhanced (CE) MR cholangiography (MRC) image quality reconstructed from HBP images. As a quantitative analysis, the SNR of the liver and the liver to lesion signal intensity ratio (LLSIR) were also determined.

Results: The liver edge sharpness, hepatic vessel conspicuity, bile duct conspicuity, and overall image quality as well as the lesion conspicuity and the LLSIR on HR HBP imaging with CS were significantly higher than those on standard HBP imaging (all of P < 0.001). The image quality of CE-MRC reconstructed from HR HBP imaging with CS was also significantly higher than that from standard HBP imaging (P < 0.001). Conversely, the SNR of liver in standard HBP was significantly higher than that in HR HBP with CS (P < 0.001).

Conclusion: BH HR HBP imaging with CS provided an improved overall image quality, lesion conspicuity, and CE-MRC visualization when compared with standard HBP imaging without extending the acquisition time.

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在钆醋酸增强肝胆期利用压缩传感获得的屏气高分辨率 T1 加权梯度回波肝脏 MR 成像:与标准 T1 加权序列相比的图像质量和病变可见度。
目的:评估在钆醋酸增强肝脏磁共振成像中使用压缩传感(CS)的屏气(BH)高分辨率(HR)T1加权梯度回波肝胆相(HBP)成像与使用平行成像(PI)的标准HBP成像的可行性:研究纳入了122例HBP低密度肝肿瘤患者,他们同时接受了CS的HR HBP成像和PI的标准HBP成像。两位放射科医生评估了肝脏边缘锐利度、肝脏血管清晰度、胆管清晰度、图像噪声和整体图像质量,以及HR和标准HBP成像的病灶清晰度和由HBP图像重建的对比增强(CE)磁共振胆管造影(MRC)图像质量。作为定量分析,还测定了肝脏的信噪比和肝脏与病变信号强度比(LLSIR):结果:使用 CS 进行 HR HBP 成像时,肝脏边缘锐利度、肝血管清晰度、胆管清晰度、整体图像质量以及病变清晰度和 LLSIR 均显著高于标准 HBP 成像(P 均<0.001)。使用 CS 进行 HR HBP 成像重建的 CE-MRC 图像质量也明显高于标准 HBP 成像(P < 0.001)。相反,标准 HBP 成像中肝脏的信噪比明显高于使用 CS 的 HR HBP 成像(P < 0.001):结论:与标准 HBP 成像相比,带 CS 的 BH HR HBP 成像可在不延长采集时间的情况下提高整体图像质量、病灶清晰度和 CE-MRC 可见度。
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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