Magnetic resonance cisternography for visualization of intracisternal fine structures
Magnetic resonance cisternography for visualization of intracisternal fine structures
复制标题
DOI：
10.3171/jns.1998.88.4.0670
复制
发表时间：
1998-04-01
影响因子：
4.1
通讯作者：
Sato, O
中科院分区：
文献类型：
--
作者：
Mamata, Y;Muro, I;Sato, O
Object.为了评估其在显示脑池解剖结构方面的有用性，作者研究了磁共振（MR）脑池造影术，其中使用重T-2加权快速自旋回波方法来可视化20名健康志愿者和43名患者的基底脑池中的正常解剖精细结构和病变。作者应用了外周脉搏、进食，这已经被优化以减少脑池中归因于脑脊液（CSF）流动的伪影。在健康志愿者中确定每个脑神经的可检测性。所有参与者的第一、第二和第三神经以及第七-第八神经复合体都清晰可见; 80%的参与者清楚地看到了第五神经，50%的参与者清楚地看到了第六脑神经。第四神经和第九至第12神经是很难单独识别，除了在一些volunteer.To减少伪影所造成的快速CSF流，我们确定的延迟作为一个函数的两个连续的峰值之间的时间流逝的脉搏波在外周脉冲门（P-P间隔），在那里有反向的流动方向，以尽量减少CSF流动相关的伪影。使用外周脉冲门控和R-R间期的30%的时间延迟，作者成功地减少了CSF流动相关的artifaction.Magnetic resonance脑池造影似乎是非常有用的，显示脑池内精细解剖和增强的轮廓的cultacisternal病变。通过该序列可以检测到插入病变和正常结构（如神经、血管或骨结构）之间的微量CSF。在面肌痉挛患者中，在平行于第7 - 8颅神经复合体的平面上获得的轴位图像和斜冠状位图像显示所有13例患者均存在血管压迫。所有9例接受微血管减压术的患者均证实了MR脑池造影所见的压迫。磁共振脑池成像似乎显示出很大的承诺，用于评价患者的神经血管压迫或肿瘤的基底脑池及其周围;该程序只增加了少量的成像时间。
Object. To assess its usefulness in demonstrating cisternal anatomy, the authors investigated magnetic resonance (MR) cisternography in which a heavily T-2-weighted turbo spin-echo method was used to visualize normal anatomical fine structures and lesions in the basal cisterns in 20 healthy volunteers and 43 patients. The authors applied peripheral pulse,eating, which had been optimized to reduce artifacts in the cisterns attributable to cerebrospinal fluid (CSF) flow.Methods. The detectability of each cranial nerve was determined in healthy volunteers. The first, second, and third nerves and the seventh-eighth nerve complex were clearly visualized in all participants; the fifth nerve was clearly seen in 80% and the sixth cranial nerve in 50%. The fourth nerve and the ninth through 12th nerves were difficult to identify individually, except in some volunteers.To reduce artifacts caused by fast CSF flow, we determined the delays as a function of the time elapsed between two consecutive peaks of pulse wave in a peripheral pulse gate (P-P interval) at which there was reversal of flow direction to minimize the CSF flow-related artifact. Using peripheral pulse gating and a time delay of 30% of the R-R interval, the authors succeeded in minimizing the CSF flow-related artifacts.Magnetic resonance cisternography appears to be very useful for demonstrating intracisternal fine anatomy and enhancing the contours of the juxtacisternal lesion. A minute amount of CSF interposed between lesions and normal structures such as nerves, vessels, or bone structures can be detected by means of this sequence. In patients with facial spasm, axial images and oblique coronal images obtained in a plane parallel to the seventh-eighth cranial nerve complex demonstrated vascular compression in all 13 patients. The MR cisternography finding of compression was confirmed in all nine patients who underwent microvascular decompression.Conclusions. Magnetic resonance cisternography appears to show great promise for evaluation of patients with neurovascular compression or tumors in and around the basal cisterns; the procedure adds only a small amount of imaging time.