Kim Bong Soo, Lee Kyung Ryeol, Goh Myeng Ju
Department of Radiology, Jeju National University Hospital, Jeju National University School of Medicine, 1753-3 Ara-1-dong, Jeju-si, Jeju-do 690-716, Republic of Korea.
Biomed Res Int. 2014;2014:142658. doi: 10.1155/2014/142658. Epub 2014 Aug 27.
MR imaging has unique benefits for evaluating the liver because of its high-resolution capability and ability to permit detailed assessment of anatomic lesions. In uncooperative patients, motion artifacts can impair the image quality and lead to the loss of diagnostic information. In this setting, the recent advances in motion-resistant liver MR techniques, including faster imaging protocols (e.g., dual-echo magnetization-prepared rapid-acquisition gradient echo (MP-RAGE), view-sharing technique), the data under-sampling (e.g., gradient recalled echo (GRE) with controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA), single-shot echo-train spin-echo (SS-ETSE)), and motion-artifact minimization method (e.g., radial GRE with/without k-space-weighted image contrast (KWIC)), can provide consistent, artifact-free images with adequate image quality and can lead to promising diagnostic performance. Understanding of the different motion-resistant options allows radiologists to adopt the most appropriate technique for their clinical practice and thereby significantly improve patient care.
由于磁共振成像（MR成像）具有高分辨率能力以及能够对解剖病变进行详细评估，因此在评估肝脏方面具有独特优势。对于不配合的患者，运动伪影会损害图像质量并导致诊断信息丢失。在这种情况下，抗运动肝脏MR技术的最新进展，包括更快的成像协议（例如，双回波磁化准备快速采集梯度回波（MP-RAGE）、视图共享技术）、数据欠采样（例如，并行成像中具有可控混叠的梯度回波（GRE）导致更高加速（CAIPIRINHA）、单次激发回波链自旋回波（SS-ETSE））以及运动伪影最小化方法（例如，带有/不带有k空间加权图像对比度（KWIC）的径向GRE），可以提供具有足够图像质量的一致、无伪影图像，并能带来有前景的诊断性能。了解不同的抗运动选项使放射科医生能够在临床实践中采用最合适的技术，从而显著改善患者护理。
