Comparison of flow artifacts between 2D-FLAIR and 3D-FLAIR sequences at 3 T
Comparison of flow artifacts between 2D-FLAIR and 3D-FLAIR sequences at 3 T
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DOI：
10.1007/s00330-004-2372-7
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发表时间：
2004-10-01
影响因子：
5.9
通讯作者：
Takizawa, O
中科院分区：
文献类型：
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作者：
Naganawa, S;Koshikawa, T;Takizawa, O
有报道称，与2D-FLAIR相比，3D-FLAIR可以减少1.5T时脑脊液(CSF)引起的流动伪影。在3T时，血流相关伪影往往比1.5T时更差。本研究的目的是比较8名健康志愿者在3T时2D-FLAIR和3D-FLAIR序列的脑脊液流动伪影。通过观察延髓周围池、桥小脑角池、第四脑室、桥前池、鞍上池、环池、侧裂、第三脑室和侧脑室，对脑脊液相关伪影进行分级。对轴位或矢状位图像进行分级。除双侧矢状裂外，所有脑脊液流动伪影在2D-FLAIR轴位图像上均显著高于3D-FLAIR轴位MPR图像，在髓周、双侧CP角和鞍上池矢状位2D-FLAIR图像上高于矢状位3D-FLAIR MPR图像。3D-FLAIR显示脑脊液相关流动伪影明显减少，池内结构显示更清晰，即使在3T时仍需进一步研究比较2D-FLAIR和3D-FLAIR在显示细微异常方面的临床效果。
It has been reported that 3D-FLAIR can reduce the flow artifact resulting from cerebrospinal fluid (CSF) at 1.5 T compared to 2D-FLAIR. Flow-related artifacts tend to be worse at 3 T than at 1.5 T. The purpose of this study was to compare the CSF flow artifacts of 2D-FLAIR and 3D-FLAIR sequences at 3 T in eight healthy volunteers. The grade of CSF-related artifacts were scored through observing the perimedullary cistern, cerebellopontine angle cisterns, fourth ventricule, prepontine cistern, suprasellar cistern, ambient cisterns, sylvian fissures, third ventricle and lateral ventricles. Grading was performed on either axial or sagittal images. The CSF in-flow artifact scores were significantly higher on axial 2D-FLAIR than on axial 3D-FLAIR MPR images in all areas except the bilateral sylvian fissures, and higher on sagittal 2D-FLAIR than on sagittal 3D-FLAIR MPR images in perimedullary, bilateral CP angle and suprasellar cisterns. The CSF-related flow artifacts were significantly reduced by 3D-FLAIR, while structures in the cistern were depicted more clearly, even at 3 T. Further study is necessary to compare the clinical efficacy between 2D-FLAIR and 3D-FLAIR in depicting subtle abnormalities.