目的  利用磁敏感加权成像（SWI）技术显影齿状核及其静脉，探讨齿状核门位置与静脉变异的关系。  方法 筛选18～30周岁的健康青壮年51例（男24例，女27例）行3.0T SWI序列头部扫描，利用最小密度投影（mIP）技术对原始图像进行后处理，通过SWI序列的原始图像以及重建后图像，对齿状核门及周围静脉的解剖形态进行观察分析。  结果  齿状核长（16.64±0.20）mm，宽（8.36±0.14）mm，两侧长宽均无差异；齿状核长轴夹角中位数为26.80°（四分位间距为34.58°）。齿状核静脉可分为外侧、内侧两组，由水平裂大静脉、核静脉、齿状核中央静脉及蚓静脉引流。齿状核外前部经核静脉引流至岩上窦；外中部由多条小静脉向外侧汇入水平裂大静脉；外后部由很多支极细小静脉引流，汇入蚓静脉或髓质静脉；内前部由蚓旁静脉、齿状核中央静脉共同引流，蚓旁静脉常于齿状核门周围汇入齿状核中央静脉，最终经蚓前静脉至直窦；内后部常汇入蚓静脉属支，蚓旁静脉可与之共同汇入蚓静脉。齿状核门75.49%位于内上象限，24.51%位于内下象限。  结论  齿状核及其静脉在SWI图像中清晰可见，齿状核门的位置可能与蚓旁静脉汇入点相关。

Objective  Make use of image dentate nucleus and the veins around it on susceptibility weighted images (SWI), explore the correlation between the location of hilum of dentate nucleus and the venous variation of dentate nucleus.   Methods  Selecting 51 healthy adults (24 men, 27 women) at the age between 18 and 30 years old to get the original images on 3.0T MR. Process the original images by minimum intensity projections (mIP) observed and analyzed the morphology of dentate nucleus and veins around it on original and processed images.   Results  The length of dentate nucleus was (16.64±0.20)mm, and the width was (8.36±0.14)mm. There was no significant difference between bilateral dentate nucleus. The median angle of the long axis of the dentate nucleus was 26.80° (interquartile distance was 34.58°). The venous network of dentate nucleus was formed in 2 groups of veins: the lateral group, drained by the vein of the horizontal fissure and nuclear vein; the medial group, drained by vermian vein and central vein of dentate nucleus. These two groups had been further typing as follows: the lateral anterior group drained by the nuclear vein, finally opening to superior petrosal sinus; the lateral median group had plenty of small veins of lateral dentate nucleus converge into the vein of the horizontal fissure; the lateral posterior group  drained by a lot of very small veins converging to vermian veins or medullary veins; the medial anterior group that the central vein of dentate nucleus and the paravermian vein were jointed at hilum of dentate 

 ucleus, opening into straight sinus; the medial posterior group usually converged into tributaries of vermian vein, or converged with paravermian vein into tributaries of vermian vein. Totally 75.49% of hilums of dentate nucleus were located at upper inner quadrant, the other 24.51% of them were located at lower inner quadrant.   Conclusion  Dentate nucleus and its veins are clearly visible on the susceptibility weighted images, and the location of the hilum of dentate nucleus may be related to the abouchement of paravermian vein.