Improved MR venography using quantitative susceptibility-weighted imaging.
Improved MR venography using quantitative susceptibility-weighted imaging.
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DOI：
10.1002/jmri.24413
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发表时间：
2014-09
影响因子：
4.4
通讯作者：
Haacke, E. Mark
中科院分区：
文献类型：
--
作者：
Liu, Saifeng;Mok, Karen;Neelavalli, Jaladhar;Cheng, Yu-Chung N.;Tang, Jin;Ye, Yongquan;Haacke, E. Mark
消除SWI中基于相位的磁化率加权掩模的几何依赖性，提高静脉和微出血的可视化。利用敏感性蒙版生成真实敏感性加权图像（tSWI）。通过仿真来评估特征参数对掩模的影响。使用3名健康成人志愿者的体内数据，比较了tSWI和SWI数据测量的右间隔静脉和左大脑静脉的对比噪声比（CNRs）。使用创伤性脑损伤（TBI）患者数据集定性地说明使用tSWI对微出血的适当可视化。与传统SWI相比，tSWI在各向同性分辨率数据集上提高了3倍以上的CNR，在各向异性分辨率数据集上提高了30%以上的CNR。不同方向的静脉在tSWI中都能得到适当的增强。此外，由于传统SWI中微出血的强偶极相引起的盛开伪影在tSWI中减少了。tSWI的使用克服了使用相位的几何限制，并提供了更好的静脉系统可视化，特别是对于各向同性分辨率收集的数据。
To remove the geometry dependence of phase based susceptibility weighting masks in SWI and to improve the visualization of the veins and microbleeds. True susceptibility weighted images (tSWI) were generated using susceptibility based masks. Simulations were used to evaluate the influence of the characteristic parameters defining the mask. In vivo data from three healthy adult human volunteers were used to compare the contrast-to-noise-ratios (CNRs) of the right septal vein and the left cerebral vein as measured from both tSWI and SWI data. A traumatic brain injury (TBI) patient dataset was used to illustrate qualitatively the proper visualization of microbleeds using tSWI. Compared with conventional SWI, tSWI improved the CNR of the two selected veins by a factor of greater than three for datasets with isotropic resolution and greater than 30% for datasets with anisotropic resolution. Veins with different orientations can be properly enhanced in tSWI. Furthermore, the blooming artifact due to the strong dipolar phase of microbleeds in conventional SWI was reduced in tSWI. The use of tSWI overcomes the geometric limitations of using phase and provides better visualization of the venous system, especially for data collected with isotropic resolution.
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影响因子：
2.5
作者：
Xu, Yingbiao;Haacke, E. Mark
通讯作者：
Haacke, E. Mark
影响因子：
4.4
作者：
Haacke, E. M.;Tang, J.;Neelavalli, J.;Cheng, Y. C. N.
通讯作者：
Cheng, Y. C. N.
影响因子：
4.8
作者：
Smith, SM
通讯作者：
Smith, SM
影响因子：
5.7
作者：
Schweser, Ferdinand;Sommer, Karsten;Reichenbach, Juergen Rainer
通讯作者：
Reichenbach, Juergen Rainer
影响因子：
5.7
作者：
Wharton, Sam;Bowtell, Richard
通讯作者：
Bowtell, Richard