“移动战伤单元”16排移动CT头部扫描试验报告

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

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χ^2检验,Ⅰ组、Ⅲ组分别与Ⅱ组比较,差异均有统计学意义(χ^2=21.645、7.901,均P<0.05);Ⅰ组与Ⅲ组比较,差异无统计学意义(χ^2=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。

Objective To explore the feasibility of head scanning with 16 row mobile CT made in China under the condition of ambulance transportation.Methods Ninety-five healthy officers and soldiers(volunteers)from a training base of the army were randomly divided into 3 groups:groupⅠ(n=77),ambulance head scanning in the stop state;groupⅡ(n=11),ambulance head scanning in driving state;groupⅢ(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.Results Bone 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 groupⅠ,81.82%(9/11)subjects had obvious motion artifacts in groupⅡ,14.29%(1/7)subjects had slight linear motion artifacts in groupⅢ.χ^2 test showed that there were significant differences in between groupⅠ,groupⅢand groupⅡ(χ^2=21.645,7.901,both P<0.05);there was no significant difference between group III and groupⅠ(χ^2=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.Conclusion The 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.