Ohta Yasutoshi, Nishii Tatsuya, Nagai Yasuhiro, Ichiba Yoshito, Tateishi Emi, Kotoku Akiyuki, Horinouchi Hiroki, Fukuyama Midori, Morita Yoshiaki, Fukuda Tetsuya
Department of Radiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe-shinmachi, Suita 564-8565, Japan (Y.O., T.N., Y.N., E.T., A.K., H.H., M.F., Y.M., T.F.); and MR Research & Collaboration Department, Siemens Healthcare K.K., Tokyo, Japan (Y.I.).
Radiol Cardiothorac Imaging. 2022 Dec 8;4(6):e220111. doi: 10.1148/ryct.220111. eCollection 2022 Dec.
To evaluate the image quality of high-spatial-resolution two-dimensional (2D) late gadolinium enhancement (LGE) cardiac MRI compared with conventional normal-resolution LGE MRI.
This prospective study included participants suspected of having cardiomyopathy who underwent cardiac MRI between March 2021 and December 2021. Normal-resolution and high-resolution 2D LGE sequences (inversion recovery [IR] and phase-sensitive inversion recovery [PSIR]) were performed at 3 T. Resolution was compared between normal-resolution and high-resolution images obtained in a quality assurance phantom. In vivo image quality and resolution were evaluated qualitatively using a five-point scoring system. Receiver operating characteristic curve analysis was used for LGE detection performance. Border sharpness was assessed with profile curve measurement. The contrast-to-noise ratio (CNR) between hyperenhancement and remote myocardium and LGE detection performance were calculated using normal-resolution IR images as the reference.
In total, 120 participants were evaluated (mean age, 56 years ± 17 [SD]; 72 men). Features smaller than 1 mm were detectable only on high-resolution images of the phantom. In vivo, the image resolution score with high-resolution LGE was 4.14-4.24, which was higher than the normal-resolution LGE reference score of 2.99 ( < .05). Border sharpness was higher in high-resolution images ( < .001). Receiver operating characteristic curve analysis revealed no evidence of a difference in LGE detection between normal-resolution and high-resolution images. There was also no evidence of a change in CNR of LGE in IR and PSIR magnitude compared with reference images.
Comparison of image quality in 2D high-resolution and normal-resolution LGE cardiac MRI demonstrated the highest resolution for high-resolution IR and high-resolution PSIR magnitude sequences. Cartilage Imaging, MRI, Cardiac, Heart, Imaging Sequences, Comparative Studies © RSNA, 2022.
评估高空间分辨率二维（2D）延迟钆增强（LGE）心脏磁共振成像（MRI）与传统正常分辨率LGE MRI的图像质量。
这项前瞻性研究纳入了2021年3月至2021年12月期间接受心脏MRI检查、疑似患有心肌病的参与者。在3T条件下进行正常分辨率和高分辨率2D LGE序列（反转恢复[IR]和相敏反转恢复[PSIR]）检查。在质量保证模型中比较正常分辨率和高分辨率图像的分辨率。使用五点评分系统对体内图像质量和分辨率进行定性评估。采用受试者操作特征曲线分析评估LGE检测性能。通过轮廓曲线测量评估边界清晰度。以正常分辨率IR图像为参考，计算强化心肌与远隔心肌之间的对比噪声比（CNR）以及LGE检测性能。
共评估了120名参与者（平均年龄56岁±17[标准差]；72名男性）。仅在模型的高分辨率图像上可检测到小于1mm的特征。在体内，高分辨率LGE的图像分辨率评分为4.14 - 4.24，高于正常分辨率LGE参考评分2.99（P <.05）。高分辨率图像的边界清晰度更高（P <.001）。受试者操作特征曲线分析显示，正常分辨率和高分辨率图像在LGE检测方面无差异证据。与参考图像相比，IR和PSIR幅度的LGE的CNR也没有变化证据。
二维高分辨率和正常分辨率LGE心脏MRI的图像质量比较表明，高分辨率IR和高分辨率PSIR幅度序列具有最高分辨率。软骨成像、MRI、心脏、心脏成像序列、对比研究 ©RSNA，2022年
