Nowinski Wieslaw Lucjan, Puspitasari Fiftarina, Volkau Ihar, Orrison William W, Knopp Michael V
Biomedical Imaging Lab, Agency for Science Technology and Research, Singapore.
J Comput Assist Tomogr. 2013 Jan-Feb;37(1):117-22. doi: 10.1097/RCT.0b013e3182765906.
Human cerebrovasculature has not been quantified in volume, length, and vascular-brain relationships. We investigated this using imaging.
From 0.5-mm 7T and 320-row CT acquisitions, 6 arterial and 4 venous systems were reconstructed, measured, and analyzed.
The ratio of the volume of arterial to venous system is approximately 1:3. The ratio of the volume of dural sinuses to vasculature is 1:2. The ratio of the posterior (PCA) to anterior (ACA) to middle cerebral artery (MCA) is 1:2:4 in volume and length. Ratios of left to right vessels are 1:1 for arteries and veins. Ratios of branching frequency for the ACA, MCA, and PCA are 1:1:1. The branching frequency ratio for superficial to deep veins is 1:2. The MCA occupies 1/2 of arterial length and 1/4 of vascular length. The ratio of the length of superficial to deep veins is 1:1 and each is equal to 1/4 of the vascular length. The ratio of cerebrovasculature to brain volume is 2.5%.
Despite its enormous complexity, cerebrovasculature is characterized by 4 approximate proportions, 1:1, 1:2, 1:3, 1:4, and their combinations, 1:1:1 and 1:2:4.
人体脑血管系统在体积、长度及血管与脑的关系方面尚未得到量化。我们利用成像技术对此进行了研究。
从0.5毫米的7T磁共振成像和320排CT扫描数据中，重建、测量并分析了6个动脉系统和4个静脉系统。
动脉系统与静脉系统的体积比约为1:3。硬脑膜窦与脉管系统的体积比为1:2。后交通动脉（PCA）、前交通动脉（ACA）与大脑中动脉（MCA）的体积比和长度比均为1:2:4。左右血管的比例，动脉和静脉均为1:1。ACA、MCA和PCA的分支频率比为1:1:1。浅静脉与深静脉的分支频率比为1:2。MCA占动脉长度的1/2和脉管长度的1/4。浅静脉与深静脉的长度比为1:1，且各占脉管长度的1/4。脑血管系统与脑体积的比为2.5%。
尽管脑血管系统极其复杂，但其具有4个近似比例特征，即1:1、1:2、1:3、1:4，以及它们的组合1:1:1和1:2:4。
