[利用三维时间飞跃磁共振血管造影术对 Willis 环进行解剖及分隔分析]
[Anatomy of the circle of Willis with 3D time of flight magnetic resonance angiography and analysis of partitions].
作者信息
Brunereau L, Lévy C, Arrivé L, Bousson V, Marsot-Dupuch K, Bousser M G, Tubiana J M
机构信息
Service de Radiologie, Hôpital Saint-Antoine, Paris.
出版信息
J Radiol. 1995 Sep;76(9):573-7.
The purpose of this study was to analyse with 3D TOF MR angiography the anatomical variants of the circle of Willis (CW) in 109 consecutive patients. In all cases, the quality of exams was sufficient to analyse the anatomy of CW. Nevertheless, MRA over estimated hypoplastic segments because incomplete CW were more frequently demonstrated with MRA than in anatomic literature. This lack of MRA sensitivity was related to artifacts as MIP artifacts and blood flow artifacts. MRA sensitivity was improved by analysis of partitions with MIP reconstructions.
本研究的目的是利用三维时间飞跃法磁共振血管造影术（3D TOF MRA）分析109例连续患者的 Willis 环（CW）解剖变异。在所有病例中，检查质量足以分析 CW 的解剖结构。然而，MRA 高估了发育不全的节段，因为与解剖学文献相比，MRA 更频繁地显示出不完整的 CW。这种 MRA 敏感性的缺乏与诸如最大密度投影（MIP）伪影和血流伪影等伪影有关。通过对 MIP 重建的分区进行分析，MRA 的敏感性得到了提高。
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