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【目的】探讨64层螺旋CT血管减影造影技术显示头部血管的能力及优势。【方法】20例头痛患者进行头部64层CT血管减影造影检查。平扫后,静脉团注对比剂进行CT血管造影,将增强前后图像重建成薄层后进行减影,从减影图像中提取动脉,进行血管三维显示。【结果】20例减影均能显示颈内动脉、椎动脉及其主要分支,其中12例无颈椎及颅底骨质干扰,血管全貌显示,余8例因头部轻微运动,颅底及颈椎骨质未能完全减去,但动脉亦能完整显示,不影响诊断。【结论】64层CT血管减影造影,重建需时少,能提供类似MRA和DSA的血管图像,值得在临床中推广应用。
【Objective】 To explore the ability and advantage of 64-slice spiral CT angiography in displaying the blood vessels in the head. 【Methods】 Twenty patients with headache were examined by 64-slice CT angiography. After the echocardiography, CT angiography was performed by injecting the contrast medium into the venous mass. The anterior and posterior images were reconstructed into thin layers and subtracted. The arteries were extracted from the subtracted images and the blood vessels were displayed three-dimensionally. 【Results】 All the 20 cases showed the internal carotid artery, vertebral artery and its main branches. Among them, 12 cases had no cervical vertebra and skull base bone interference. The whole blood vessel showed that the other 8 cases had mild head movement, skull base and cervical spine Bone can not be completely subtracted, but the artery can also be displayed intact, does not affect the diagnosis. 【Conclusion】 64-slice CT angiography provides less time for reconstruction and can provide MRA and DSA images. It is worth to be popularized in clinic.