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目的：探讨合理的脑血管电子束ＣＴ（ＥＢＣＴ）的检查模式。材料与方法：选择７２例ＥＢＣＴＡ检查结果正常者随机分组、对照，进行前瞻性研究，采用ＩｍａｔｒｏｎＣ１５０ＥＢＣＴ扫描仪，连续容积（ＣＶＳ）和步进式（ＳＶＳ）两种扫描模式，３～５ｍｌ／ｓ注射速度，重建方法选择最大信号强度投影（ＭＩＰ）和表面遮盖法（ＳＳＤ）。结果：（１）同一剂量下，ＣＶＳ扫描组的不同脑血管部位ＣＴ值要高于相同条件下的ＳＶＳ扫描组（Ｐ＜０．０１）；同一扫描模式组内，５ｍｌ／ｓ组的不同脑血管部位ＣＴ值高于３ｍｌ／ｓ组（Ｐ＜０．０１）；３ｍｌ／ｓＣＶＳ扫描组的不同脑血管部位ＣＴ值与５ｍｌ／ｓＳＶＳ组无明显差异（Ｐ＞０．０５）；（２）各组对于各级脑血管的主干及１～３级分支显示率为１００％，对于大脑中动脉４～５级分支５ｍｌ／ｓＣＶＳ组显示率仍高达９４．４％，前、后交通动脉的显示率存在较大差异。结论：注射速度５ｍｌ／ｓ，延迟时间由小剂量试验而定（一般为１２～１６ｓ），层厚３ｍｍ，间隔１．５ｍｍ，ＣＶＳ重叠扫描模式是较为理想的电子束ＣＴ检查模式。
Objective: To explore a reasonable examination mode of cerebrovascular electron beam computed tomography (EBCT). MATERIALS AND METHODS: Seventy-two patients with normal EBCTA were randomly divided into control group and control group. The prospective study was conducted. ImacanC-150EBCT scanner, continuous volume (CVS) and step-by-step (SVS) s injection speed, reconstruction method to choose the maximum signal intensity projection (MIP) and surface covering method (SSD). Results: (1) Under the same dose, CT value of different cerebrovascular parts in CVS scan group was higher than that of SVS scan group under the same condition (P <0.01); in the same scan mode group, The CT value of the vascular site was higher than that of the 3ml / s group (P <0.01). There was no significant difference in the CT value between the 3ml / sCVS scan group and the 5ml / sSVS group (P> 0.05) For all levels of cerebrovascular trunk and grade 1 to 3 branches showed a rate of 100%, 4 to 5 branches of the middle cerebral artery 5ml / sCVS group showed a high rate of 94.4%, the anterior and posterior communicating artery display rate There is a big difference. Conclusion: The injection speed of 5ml / s, the delay time is determined by the low-dose test (usually 12 ~ 16s), the thickness of 3mm, the interval of 1.5mm, CVS overlapped scanning mode is the ideal electron beam CT examination mode.