CT血管成像诊断破入蝶窦的颈内动脉创伤性假性动脉瘤

目的 评价颅脑CTA在海绵窦段颈内动脉创伤性假性动脉瘤中的诊断价值.方法 对7例经DSA证实的颈内动脉海绵窦段创伤性假性动脉瘤患者的CTA联合应用VR、MIP、MPR、CPR后处理技术及临床资料进行回顾性分析.结果 7例CTA均表现为蝶窦内不规则软组织影与海绵窦段颈内动脉同步均匀强化并与其沟通,边界清晰,边缘不规则,病变大小自3 mm×2 mm×1 mm～33 mm×30 mm×27 mm.周边为动脉期不强化的软组织影,邻近蝶窦壁骨折、缺损.6例病变位于海绵窦段颈内动脉前突段,1例位于游离段.7例破口均位于颈内动脉内壁或前内壁.多种后处理技术联合应用可明确显示病变与蝶窦腔、蝶窦骨质及邻近血管的空间关系.结论 颅脑CTA检查对破入蝶窦的海绵窦段颈内动脉创伤性假性动脉瘤可明确诊断;VR、MIP、MPR、CPR后处理技术联合应用可明确蝶窦壁骨折和颈内动脉破口的位置、范围及其二者的关系.

Abstract：

Objective To investigate diagnostic value of CTA for traumatic pseudoaneurysms (TPA) in the cavernous segment of the internal carotid artery (ICA) when they rupture into the sphenoid sinus. Methods CTA of 7 patients with TPA in the cavernous segments of ICA verified by DSA were retrospectively analyzed. All the patients were performed CTA scanning. The post-processing techniques included VR,MIP,MPR, and CPR. Results All the CTA images of 7 patients showed irregular mass in the sphenoid sinus with obviously enhancement in the same phase to ICA, which communicating with ICA in wide base. The peripheral area of the mass showed no enhancement. The size varied from 3 mm × 2 mm × 1 mm to 33 mm × 30 mm × 27 mm. The adjacent lateral wall of sphenoid sinus showed fractures in all cases. TPA located at anterior-knee segments of cavernous ICA in 6 cases, and cavernous free segment in 1 case. All the disruptions were found at medial or anterior medial wall of ICA. Conclusions Cranial CTA is the effective non-invasive method for diagnosing TPA in the cavernous segment of ICA when they rupture into sphenoid sinus. Combined using of VR, MIP, MPR, and CPR can delineate the location and size of the sphenoid wall fracture and the ICA rupture, which help to clarify the anatomical relationship between them.

CT angiography diagnosis on the rupture of traumatic pseudoaneurysms of the cavernous of the internal carotid artery into the sphenoid sinus

Objective To investigate diagnostic value of CTA for traumatic pseudoaneurysms (TPA) in the cavernous segment of the internal carotid artery (ICA) when they rupture into the sphenoid sinus. Methods CTA of 7 patients with TPA in the cavernous segments of ICA verified by DSA were retrospectively analyzed. All the patients were performed CTA scanning. The post-processing techniques included VR,MIP,MPR, and CPR. Results All the CTA images of 7 patients showed irregular mass in the sphenoid sinus with obviously enhancement in the same phase to ICA, which communicating with ICA in wide base. The peripheral area of the mass showed no enhancement. The size varied from 3 mm × 2 mm × 1 mm to 33 mm × 30 mm × 27 mm. The adjacent lateral wall of sphenoid sinus showed fractures in all cases. TPA located at anterior-knee segments of cavernous ICA in 6 cases, and cavernous free segment in 1 case. All the disruptions were found at medial or anterior medial wall of ICA. Conclusions Cranial CTA is the effective non-invasive method for diagnosing TPA in the cavernous segment of ICA when they rupture into sphenoid sinus. Combined using of VR, MIP, MPR, and CPR can delineate the location and size of the sphenoid wall fracture and the ICA rupture, which help to clarify the anatomical relationship between them.