低剂量MSCT一站式全脑灌注与动态动脉成像评价脑动脉瘤及其临床价值

发布时间：2018-08-27 14:21

【摘要】：目的探讨低剂量MSCT摇篮扫描技术一站式全脑灌注与动态CTA检查的可行性及其在评价脑动脉瘤中的优越性。方法选择63例临床疑诊脑动脉瘤的患者,分为两组,动态CTA组(33例)应用80 k V和100 m As的MSCT摇篮扫描技术进行一站式全脑灌注与动态CTA检查。常规CTA组(30例)CTA前平扫参数为100 k V和100 m As,CTA检查参数为100 k V和260 m As。对两组患者的辐射剂量与CTA图像质量分别进行比较;另对动态CTA组患者进行灌注分析。结果动态CTA组患者一站式脑灌注与动态CTA检查平均辐射剂量仅为(1.64±0.00)m Sv,常规CTA组患者平均辐射剂量为(1.68±0.17)m Sv,两组间差异无显著统计学意义(P0.05)。动态CTA中最佳时相图像质量与常规CTA比较,血管强化程度及图像噪声较高,然而信噪比(SNR)、对比噪声比(CNR)差异无显著统计学意义(P0.05)。94%(31/33)患者成功获得灌注图像,其中2例发现局限性灌注减低区域。结论低剂量MSCT摇篮扫描技术一站式脑灌注与CTA检查,能在不增加患者辐射剂量的前提下获得满意的图像质量,可实现脑动脉瘤患者动脉形态学与脑灌注功能的一站式综合评估。
[Abstract]:Objective to investigate the feasibility of low dose MSCT cradle scanning technique in evaluating cerebral aneurysms by one stop whole brain perfusion and dynamic CTA. Methods Sixty-three patients with suspected cerebral aneurysms were divided into two groups: dynamic CTA group (n = 33) were examined with 80 kV and 100 m As MSCT cradle scanning technique for global cerebral perfusion and dynamic CTA examination. In routine CTA group (30 cases), the plain scan parameters of CTA were 100kV and 100m As,CTA were 100kV and 260m As.. The radiation dose and CTA image quality were compared between the two groups, and perfusion analysis was performed in the dynamic CTA group. Results the average radiation dose of one-stop cerebral perfusion and dynamic CTA in dynamic CTA group was (1.64 卤0.00) m Sv,) and (1.68 卤0.17) m Sv, respectively. There was no significant difference between the two groups (P0.05). Compared with conventional CTA, the optimal time phase image quality in dynamic CTA was higher in enhancement degree and image noise. However, the signal-to-noise ratio (SNR) of (SNR), contrast noise was not significantly different from that of (CNR) (P0.05) .94% (31 / 33) patients successfully obtained perfusion images. In 2 cases, the area of local hypoperfusion was found. Conclusion One-stop cerebral perfusion and CTA examination with low dose MSCT cradle scanning technique can obtain satisfactory image quality without increasing the radiation dose of patients, and can realize the comprehensive evaluation of cerebral artery morphology and cerebral perfusion function in patients with cerebral aneurysms.
【作者单位】：华中科技大学同济医学院附属协和医院放射科;浙江省人民医院放射科;
【分类号】：R743;R816.1

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