Yin Liang, Li ZhangZhu, Shang MingYan, Li ZongChang, Tang BoWen, Yu Dan, Gan Jie
Department of Medical Imaging, Shandong Provincial Third Hospital, Jinan, China.
United Imaging Research Institute of Intelligent Imaging, Beijing, China.
BMC Med Imaging. 2024 Dec 5;24(1):331. doi: 10.1186/s12880-024-01512-0.
This study aimed to assess the feasibility and performance of 5.0 T MRI in MR Cholangiopancreatography (MRCP) imaging compared to 3.0 T, focusing on detail visualization, signal-to-noise ratio (SNR), and image artifacts.
A prospective study from May to October 2023 involved 20 healthy subjects and 19 with biliary dilation. Both groups underwent MRCP using 3.0 T and 5.0 T scanners. The detail visualization capability of the biliary tree and the SNR of the images were quantitatively evaluated. Two experienced MRI diagnostic physicians assessed the image artifacts qualitatively on a scale of 1 to 5. The t-test or Wilcoxon signed-rank test compared the quantitative results of biliary visualization and SNR between 3.0 T and 5.0 T scanners, while the Wilcoxon signed-rank test was used for comparing the level of image artifacts between the two scanners. The inter reader consistency was tested using Kappa test.
In both healthy subjects and those with biliary dilation, the 5.0 T group exhibited significantly higher numbers of biliary tree branches, along with greater total and maximum branch lengths, compared to the 3.0 T group (P<0.05). Although the maximum branch length was higher in the 5.0 T group among healthy subjects, this difference was not statistically significant (P = 0.053). No notable differences were observed in SNR and image artifact levels between the two groups across both field strengths (P>0.05).
MRCP at 5.0 T offers superior biliary tree visualization compared to 3.0 T. The performance regarding SNR and image artifacts between the two is relatively comparable.
本研究旨在评估5.0 T磁共振成像（MRI）在磁共振胰胆管造影（MRCP）成像中的可行性和性能，并与3.0 T MRI进行比较，重点关注细节可视化、信噪比（SNR）和图像伪影。
2023年5月至10月的一项前瞻性研究纳入了20名健康受试者和19名胆管扩张患者。两组均使用3.0 T和5.0 T扫描仪进行MRCP检查。定量评估胆管树的细节可视化能力和图像的SNR。两名经验丰富的MRI诊断医师对图像伪影进行1至5级的定性评估。采用t检验或Wilcoxon符号秩检验比较3.0 T和5.0 T扫描仪之间胆管可视化和SNR的定量结果，而Wilcoxon符号秩检验用于比较两台扫描仪之间的图像伪影水平。使用Kappa检验测试读者间的一致性。
在健康受试者和胆管扩张患者中，与3.0 T组相比，5.0 T组的胆管树分支数量显著更多，总分支长度和最大分支长度也更长（P<0.05）。虽然健康受试者中5.0 T组的最大分支长度更高，但这种差异无统计学意义（P = 0.053）。在两种场强下，两组之间的SNR和图像伪影水平均未观察到显著差异（P>0.05）。
与3.0 T相比，5.0 T的MRCP能提供更优的胆管树可视化。两者在SNR和图像伪影方面的表现相对可比。
