16排移动CT救援直升机载头部扫描报告

Head scanning reports with 16 row mobile CT by rescue helicopter

目的探讨国产16排移动CT在直升机运载条件下进行头部扫描成像的可行性。方法选取空军某部服役的健康官兵88人,随机分为飞行组与对照组。飞行组为直升机在空中飞行状态下进行头部扫描,对照组为直升机在着陆状态下进行头部扫描。分析对比2组扫描成像质量、运动伪影、数据采集及信息传输情况。结果骨窗成像:2组受检者颅骨、眼眶、鼻蝶窦等成像清晰;脑组织窗成像:2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,但在颅底部分层面存在运动伪影,其中飞行组88.89%的受检者有较明显的运动伪影,而对照组26.58%的受检者有较轻微的线状运动伪影,2组的运动伪影比较差异有统计学意义(χ2=14.196,P=0.001)。飞行状态下,移动CT数据采集及信息传输正常,2组辐射剂量CTDIvol均为36.27 mGy。结论 16排移动CT在飞行状态下扫描成像稳定,数据采集及信息传输正常。

Objective To explore the feasibility of head scanning imaging with 16 row mobile CT made in China under the condition of helicopter transportation.Methods Eighty-eight healthy officers and soldiers serving in a certain air force department were randomly divided into flight group(helicopter in the air flying state for head scanning)and control group(helicopter conducted head scanning in landing state).The imaging quality,motion artifacts,data acquisition and information transmission of 2 groups were analyzed and compared.Results Bone window imaging:the skull,orbit and sphenoid sinus were clearly imaged in both groups.Window imaging of brain tissue:the structures of eyeball,optic nerve,brain stem,cortex and white matter were clearly displayed in both groups.But there is motion artifact in part of skull base,88.89%of the subjects had obvious motion artifacts in flight group,26.58%of the subjects had slight linear motion artifacts in control group,there was significant difference between both groups(χ2=14.196,P=0.001).The data showed that acquisition and information transmission of mobile CT are normal in flight.The dose of CTDIvol was 36.27 mGy in both groups.Conclusion The 16 row mobile CT scanning is stable and the data acquisition and information transmission are normal in flight.