Liauw L, van Buchem M A, Spilt A, de Bruïne F T, van den Berg R, Hermans J, Wasser M N
Department of Radiology, Leiden University Medical Center, The Netherlands.
Radiology. 2000 Mar;214(3):678-82. doi: 10.1148/radiology.214.3.r00mr41678.
To compare the effectiveness of different imaging planes at time-of-flight (TOF) magnetic resonance (MR) angiography and phase-contrast MR angiography in the visualization of the normal intracranial venous system.
In 12 healthy volunteers, two-dimensional (2D) TOF MR angiography and three-dimensional (3D) phase-contrast MR angiography were performed in transverse, sagittal, and coronal planes. All data were displayed as maximum intensity projection (MIP) images. Four neuroradiologists assessed the visibility of 28 intracranial venous structures on the MIP images. Statistical analysis was performed by using the Friedman two-way analysis of variance and the Cochran Q test.
Visualization of the normal intracranial venous system was better with 3D phase-contrast and coronal 2D TOF MR angiography than with transverse or sagittal 2D TOF MR angiography (P < .05, Friedman test) for each observer and the group of observers. Differences were found between each of the 2D TOF and 3D phase-contrast MR angiographic sequences in the visualization of individual venous structures (Cochran Q test). The kappa values ranged from 0.36 to 0.71, which indicated a moderate to good agreement between observers.
The normal intracranial venous system is adequately visualized with 3D phase-contrast and coronal 2D TOF MR angiography.
比较飞行时间（TOF）磁共振（MR）血管造影和相位对比MR血管造影中不同成像平面在显示正常颅内静脉系统方面的有效性。
对12名健康志愿者在横断、矢状和冠状平面进行二维（2D）TOF MR血管造影和三维（3D）相位对比MR血管造影。所有数据均显示为最大强度投影（MIP）图像。四名神经放射科医生评估了MIP图像上28个颅内静脉结构的可视性。采用Friedman双向方差分析和Cochran Q检验进行统计分析。
对于每位观察者和观察者组，3D相位对比和冠状面2D TOF MR血管造影对正常颅内静脉系统的显示优于横断面或矢状面2D TOF MR血管造影（Friedman检验，P <.05）。在单个静脉结构的显示方面，2D TOF和3D相位对比MR血管造影序列之间存在差异（Cochran Q检验）。kappa值范围为0.36至0.71，表明观察者之间存在中度至良好的一致性。
3D相位对比和冠状面2D TOF MR血管造影能够充分显示正常颅内静脉系统。
