New MR imaging methods for metallic implants in the knee: artifact correction and clinical impact.
New MR imaging methods for metallic implants in the knee: artifact correction and clinical impact.
复制标题
DOI：
10.1002/jmri.22534
复制
发表时间：
2011-05
影响因子：
4.4
通讯作者：
Gold, Garry E.
中科院分区：
文献类型：
--
作者：
Chen, Christina A.;Chen, Weitian;Goodman, Stuart B.;Hargreaves, Brian A.;Koch, Kevin M.;Lu, Wenmaio;Brau, Anja C.;Draper, Christine E.;Delp, Scott L.;Gold, Garry E.
评估两种磁共振成像 (MRI) 技术：金属伪影校正切片编码 (SEMAC) 和多重采集可变共振图像组合 (MAVRIC)，其校正金属术后膝盖伪影的能力。本研究中总共对 25 个膝盖进行了成像。使用 SEMAC、MAVRIC 和二维快速自旋回波 (FSE) 扫描志愿者的 14 个全膝关节置换术 (TKR)，以测量伪影范围和植入物旋转。在 TKR 膝关节模型中比较了序列测量植入物旋转和尺寸的能力。使用 SEMAC 和 FSE 对 11 名具有各种金属硬件的患者进行成像，以比较伪影程度，并记录随后的患者管理。与 FSE 相比，SEMAC 和 MAVRIC 显着减少了伪影程度 (p < 0.0001)，并且彼此相似 (p = 0.58)，可以准确测量种植体尺寸和旋转。志愿者的 TKR 得到了正确的调整。在有症状的膝盖中使用 SEMAC 进行的临床成像显着减少了伪影 (p < 0.05)，并且显示的结果大多数都被随后的非侵入性或侵入性患者研究所证实。 SEMAC 和 MAVRIC 纠正金属伪影，以非侵入方式提供具有出色骨骼和软组织对比度的高分辨率图像。
To evaluate two magnetic resonance imaging (MRI) techniques, Slice Encoding for Metal Artifact Correction (SEMAC) and Multi-Acquisition Variable-Resonance Image Combination (MAVRIC), for their ability to correct for artifacts in post-operative knees with metal. A total of 25 knees were imaged in this study. Fourteen total knee replacements (TKRs) in volunteers were scanned with SEMAC, MAVRIC, and two-dimensional fast spin-echo (FSE) to measure artifact extent and implant rotation. The ability of the sequences to measure implant rotation and dimensions was compared in a TKR knee model. Eleven patients with a variety of metallic hardware were imaged with SEMAC and FSE to compare artifact extent, and subsequent patient management was recorded. SEMAC and MAVRIC significantly reduced artifact extent compared to FSE (p < 0.0001) and were similar to each other (p = 0.58), allowing accurate measurement of implant dimensions and rotation. The TKRs were properly aligned in the volunteers. Clinical imaging with SEMAC in symptomatic knees significantly reduced artifact (p < 0.05) and showed findings that were on the majority confirmed by subsequent non-invasive or invasive patient studies. SEMAC and MAVRIC correct for metal artifact, non-invasively providing high-resolution images with superb bone and soft tissue contrast.
登录
查看更多内容
影响因子：
5.3
作者：
Kurtz, S;Mowat, F;Halpern, M
通讯作者：
Halpern, M
影响因子：
5.5
作者：
Olsen, RV;Munk, PL;Masri, B
通讯作者：
Masri, B
影响因子：
3.3
作者：
Koch, Kevin M.;Lorbiecki, John. E.;King, Kevin F.
通讯作者：
King, Kevin F.
影响因子：
3.3
作者：
Koch, K. M.;Brau, A. C.;King, K. F.
通讯作者：
King, K. F.
影响因子：
3.8
作者：
CHO, ZH;KIM, DJ;KIM, YK
通讯作者：
KIM, YK