"移动战伤单元"16排移动CT头部扫描试验报告

目的探讨国产16排移动CT在救护车运载条件下进行头部扫描成像的可行性。 方法选取陆军某部训练基地的志愿者健康官兵95人，随机分为3组：Ⅰ组（77人），救护车在停止行驶状态下进行头部扫描；Ⅱ组（11人），救护车在行驶状态下进行头部扫描；Ⅲ组（7人），设置电磁波干扰环境。分析对比3组受检者在不同状态下，移动CT扫描成像质量、运动伪影、数据采集及信息传输情况。 结果骨窗成像：3组受检者颅骨、眼眶、鼻蝶窦等成像清晰。脑组织窗成像：3组受检者均可清晰显示眼球、视神经、脑干、脑皮质及脑白质等结构，但颅底部分层面均存在不同程度的运动伪影，其中Ⅰ组16.88%（13/77）受检者有较轻微的线状运动伪影，Ⅱ组81.82%（9/11）受检者有较明显的运动伪影；Ⅲ组14.29%（1/7）受检者有轻微线状运动伪影。经χ²检验，Ⅰ组、Ⅲ组分别与Ⅱ组比较，差异均有统计学意义（χ²=21.645、7.901，均P<0.05）；Ⅰ组与Ⅲ组比较，差异无统计学意义（χ²=0.031，P>0.05）。在电磁干扰状态下，移动CT数据采集及信息传输正常，3组辐射剂量CTDIvol均为36.27 mGy。 结论16排移动CT在救护车行驶及电磁干扰状态下扫描成像稳定安全，数据采集及信息传输正常。

Head scanning report with 16 row mobile CT in "mobile War Wound Unit"

ObjectiveTo explore the feasibility of head scanning with 16 row mobile CT made in China under the condition of ambulance transportation. MethodsNinety-five healthy officers and soldiers (volunteers) from a training base of the army were randomly divided into 3 groups: group Ⅰ (n=77), ambulance head scanning in the stop state; group Ⅱ (n=11), ambulance head scanning in driving state; group Ⅲ (n=7), setting electromagnetic interference environment. The imaging quality, motion artifact, data acquisition and information transmission of the 3 groups in different states were analyzed and compared. ResultsBone window imaging: The skull, orbit and sphenoid sinus in group were clearly imaged in three groups. Window imaging of brain tissue: The structures of eyeball, optic nerve, brain stem, cortex and white matter were clearly displayed in 3 groups, but there were different degrees of motion artifacts in the skull base. Among them, 16.88% (13/77) subjects had slight linear motion artifacts in group Ⅰ, 81.82% (9/11) subjects had obvious motion artifacts in group Ⅱ, 14.29% (1/7) subjects had slight linear motion artifacts in group Ⅲ. χ² test showed that there were significant differences in between group Ⅰ, group Ⅲ and group Ⅱ (χ²=21.645, 7.901, both P<0.05); there was no significant difference between group III and group Ⅰ (χ²=0.031, P>0.05). The data acquisition and information transmission of mobile CT are normal in the state of electromagnetic interference. The dose of CTDIvol was 36.27 mGy in 3 groups. ConclusionThe 16 row mobile CT scan image is stable and safe under the conditions of ambulance driving and electromagnetic interference, and the data are normal of acquisition and information transmission.