Qian Xianling, Wang Shiyu, Wu Yali, Miao Xiyin, Chen Yinyin, Lu Hongfei, Wang Rui, Wang Dong, Wang Fang, Zhang Shiyu, Hao Jiaxin, Jin Hang, Zeng Mengsu
From the Department of Radiology, Zhongshan Hospital, Fudan University, Xuhui District, Shanghai 200032, China (X.Q., S.W., Y.W., X.M., Y.C., H.L., H.J., M.Z.); Shanghai Institute of Medical Imaging, Shanghai, China (X.Q., S.W., Y.W., X.M., Y.C., H.L., H.J., M.Z.); and United Imaging Health Care Group, Shanghai, China (R.W., D.W., F.W., S.Z., J.H.).
Radiol Cardiothorac Imaging. 2024 Dec;6(6):e240035. doi: 10.1148/ryct.240035.
Purpose To compare the acquisition time, image quality, and late gadolinium enhancement (LGE) visualization and quantification on phase-sensitive inversion recovery (PSIR) images using 5.0-T versus 3.0-T cardiac MRI. Materials and Methods In this prospective crossover study, 49 participants (mean ± SD age, 43.7 years ± 13.1; 39 men) suspected or diagnosed with nonischemic cardiomyopathy were enrolled from April 2023 to March 2024 and randomly assigned to group 1 (5.0-T followed by 3.0-T LGE cardiac MRI) or group 2 (3.0-T followed by 5.0-T LGE cardiac MRI). PSIR images were acquired at spatial resolutions of 1.2, 0.9, and 1.6 mm. Image quality and LGE were qualitatively evaluated using a five-point Likert scale by two readers, and signal-to-noise ratio, contrast-to-noise ratio, and LGE mass were quantitatively assessed. Bland-Altman plots were used to evaluate interreader agreement. Results There was no evidence of a difference in the acquisition time for obtaining a single-layer PSIR image at 5.0 T compared with 3.0 T ( > .05 for all), irrespective of resolutions at 1.2, 0.9, and 1.6 mm. The 5.0-T PSIR images demonstrated better image quality and LGE visualization compared with 3.0-T images, particularly at 1.2 mm (image quality: median 5 [IQR, 5-5] vs median 5 [IQR, 4-5]; = .004; LGE score: median 5 [IQR, 5-5] vs median 4.25 [IQR, 4-5]; < .001). No evidence of differences in image quality or LGE scores was found between 5.0-T and 3.0-T cardiac MRI at 1.6-mm resolution. Signal-to-noise ratio and contrast-to-noise ratio were higher on 5.0-T PSIR images across all resolutions compared with 3.0-T images ( < .001 for all), but no evidence of a difference was found in LGE mass measurements. Conclusion The study demonstrates that 5.0-T PSIR imaging offers better image quality and LGE visualization than 3.0-T PSIR, particularly at a 1.2-mm resolution, in individuals with nonischemic cardiomyopathy. MRI, Cardiac, Heart, Comparative Studies, Nonischemic Cardiomyopathy, Late Gadolinium Enhancement, Phase-Sensitive Inversion Recovery ©RSNA, 2024.
目的 比较使用5.0-T与3.0-T心脏磁共振成像（MRI）时，相敏反转恢复（PSIR）图像的采集时间、图像质量以及延迟钆增强（LGE）的可视化和定量分析。材料与方法 在这项前瞻性交叉研究中，2023年4月至2024年3月招募了49名疑似或诊断为非缺血性心肌病的参与者（平均年龄±标准差，43.7岁±13.1；39名男性），并将其随机分为1组（先进行5.0-T LGE心脏MRI，后进行3.0-T LGE心脏MRI）或2组（先进行3.0-T LGE心脏MRI，后进行5.0-T LGE心脏MRI）。以1.2、0.9和1.6 mm的空间分辨率采集PSIR图像。由两名阅片者使用五点李克特量表对图像质量和LGE进行定性评估，并对信噪比、对比噪声比和LGE质量进行定量评估。采用Bland-Altman图评估阅片者间的一致性。结果 无论1.2、0.9和1.6 mm的分辨率如何，与3.0-T相比，5.0-T获取单层PSIR图像的采集时间均无差异（所有P>0.05）。与3.0-T图像相比，5.0-T的PSIR图像显示出更好的图像质量和LGE可视化效果，尤其是在空间分辨率为1.2 mm时（图像质量：中位数5[四分位间距，5-5]对中位数5[四分位间距，4-5]；P=0.004；LGE评分：中位数5[四分位间距，5-5]对中位数4.25[四分位间距，4-5]；P<0.001）。在1.6-mm分辨率下，5.0-T和3.0-T心脏MRI的图像质量或LGE评分未发现差异。与3.0-T图像相比，5.0-T的PSIR图像在所有分辨率下的信噪比和对比噪声比均更高（所有P<0.001），但在LGE质量测量方面未发现差异。结论 该研究表明，对于非缺血性心肌病患者，5.0-T PSIR成像比3.0-T PSIR提供了更好的图像质量和LGE可视化效果，尤其是在1.2-mm分辨率时。MRI，心脏，心脏，对比研究，非缺血性心肌病，延迟钆增强，相敏反转恢复 ©RSNA，2024。
