论文部分内容阅读
目的:探讨直窦近端解剖形态的CTA表现。方法:采用64层螺旋CT行头部及头颈部CTA,回顾性三维重建100例直窦近端影像。观察大脑大静脉汇入直窦处形态、直窦顶的形态、下矢状窦形态、大脑永存镰状窦显示率及形态。结果:①根据大脑大静脉末端形态及其管腔是否变细,将大脑大静脉汇入直窦处形态分为3型,I型-管腔变细,占46%;II型-管腔无变细,中间无间隙,占32%;III型-管腔内充盈缺损,占22%。②直窦顶可为:弧形35例,“一”字形28例,倒“V”字形24例,不规则形8例,柱形3例,T形1例,双峰形1例等七种类型。③下矢状窦显示占65%,缺如占35%;其形态可呈向上凸起弧状或弯曲状;管腔可粗细不均。④大脑永存镰状窦显示率为9%,形态多样,其中4例伴有其他静脉窦发育变异。结论:直窦近端解剖学特征复杂,利用MSCTA可以个体化、完整、有效、充分地显示其活体解剖特点,可为临床上静脉窦病变的诊断和治疗提供依据。
Objective: To investigate the CTA manifestations of proximal sinus anatomy. Methods: A 64-slice spiral CT head and neck CTA was used to retrospectively reconstruct 100 cases of proximal sinus images. Observe the morphology of the main vein of the cerebral anastomosis, the shape of the straight sinus top, the shape of the inferior sagittal sinus, the display rate and shape of the permanent falx sinus of the brain. Results: ① According to the morphological changes of the distal end of the cerebral vein and whether its lumen became thinner, the main vena cava into the straight sinus was divided into type 3, Type I - the lumen narrowed, accounting for 46%; Type II - Thinning, the middle of no gap, accounting for 32%; Type III - lumen filling defect, accounting for 22%. The straight sinus top could be: 35 cases of arc, 28 cases of “一” shape, 24 cases of inverted “V” shape, 8 cases of irregular shape, 3 cases of column shape, 1 case of T shape, 1 case of bimodal shape 1 case, such as seven types. ③ inferior sagittal sinus showed 65%, missing, accounting for 35%; its shape can be convex upward curved or curved; lumen can be uneven thickness. ④ Forehead permanent sickle sinus display rate of 9%, various forms, of which 4 cases associated with other sinus varicocele development. Conclusion: The proximal anatomical features of straight sinus are complex. MSCTA can be used individually, completely and effectively to fully display the biopsy features of venous sinuses. It can provide a basis for the diagnosis and treatment of sinus venous lesions in clinic.