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目的探讨双源CT血管成像(DSCTA)多种后处理技术对颅内动脉瘤的诊断价值。方法回顾性分析经手术或数字减影血管造影术(DSA)证实的颅内动脉瘤38例。采用西门子双源CT机(Somatom Definition),所得原始数据在工作站采用容积再现(VR)、最大密度投影(MIP)、多平面重组(MPR)、曲面重组(CPR)、去骨减影及双能去骨减影技术对动脉瘤的大小、瘤颈、瘤内血栓、瘤壁钙化及载瘤动脉等方面进行显示。结果 DSCTA显示颅内动脉瘤38例,单发33例,4例为2个动脉瘤,1例为3个动脉瘤,共44个动脉瘤。颈内动脉17个,前交通动脉8个,基底动脉6个,后交通动脉5个,大脑中动脉4个,大脑前动脉4个。动脉瘤平均直径(7.2±1.7)mm,最小动脉瘤直径2.1 mm。清晰显示瘤颈38例,44个动脉瘤瘤壁钙化4例,瘤内血栓3例。结论 DSCTA多模式重建技术可清楚显示颅内动脉瘤的大小、形态、位置、多少及其与周围结构的关系,是颅内动脉瘤的检出及制定治疗计划的非常有用的方法。
Objective To investigate the diagnostic value of multiple post-treatment techniques of dual-source CT angiography (DSCTA) for intracranial aneurysms. Methods Retrospective analysis of 38 cases of intracranial aneurysms confirmed by surgery or digital subtraction angiography (DSA). Based on Siemens Somatom Definition, the original data was processed at the workstation using volumetric reconstruction (VR), maximum density projection (MIP), multiplanar reconstruction (MPR), surface reconstruction (CPR), bone subtraction and dual energy Debride subtraction technology on the size of the aneurysm, neck, tumor thrombus, tumor wall calcification and carrier artery and so on. Results DSCTA showed intracranial aneurysms in 38 cases, single in 33 cases, 4 cases of 2 aneurysms, 1 case of 3 aneurysms, a total of 44 aneurysms. 17 internal carotid arteries, 8 anterior communicating arteries, 6 basilar arteries, 5 posterior communicating arteries, 4 middle cerebral arteries and 4 anterior cerebral arteries. The average diameter of the aneurysm was (7.2 ± 1.7) mm and the diameter of the smallest aneurysm was 2.1 mm. Thirty-eight neoplasms were clearly shown, 44 aneurysm wall calcification in 4 cases and thrombus in the aneurysm in 3 cases. Conclusion The multi-modal reconstruction technique of DSCTA can clearly show the size, shape, location and number of intracranial aneurysms and their relationship with the surrounding structures. It is a very useful method to detect intracranial aneurysms and formulate treatment plans.