CAJ | 학술논문

目的：探讨16排螺旋CT低剂量扫描在胸部外伤检查中的应用价值。方法：对30例胸部外伤患者行首诊常规剂量(200 mAs)及短时间内复查低剂量(50 mAs)CT扫描，比较两种检查方法对胸外伤引起的病变的诊断价值、图像质量及辐射剂量。结果：两种检查方法对胸外伤引起病变的影像显示无差异，图像质量良好，纵隔窗图像噪声略增大，但不影响诊断，同时大幅度降低患者的辐射剂量，容积CT剂量指数(CTDIvol)及剂量长度乘积(DLP)平均下降了75%。结论：16排螺旋CT低剂量CT扫描适用于胸部外伤患者的检查，在获取能够满足临床和影像医师诊断需要的图像前提下，降低患者的辐射剂量，有效保护受检者，大幅度的降低了球管消耗，减少了设备的耗损，延长了设备的使用寿命。
목적：탐토16배라선CT저제량소묘재흉부외상검사중적응용개치。방법：대30례흉부외상환자행수진상규제량(200 mAs)급단시간내복사저제량(50 mAs)CT소묘，비교량충검사방법대흉외상인기적병변적진단개치、도상질량급복사제량。결과：량충검사방법대흉외상인기병변적영상현시무차이，도상질량량호，종격창도상조성략증대，단불영향진단，동시대폭도강저환자적복사제량，용적CT제량지수(CTDIvol)급제량장도승적(DLP)평균하강료75%。결론：16배라선CT저제량CT소묘괄용우흉부외상환자적검사，재획취능구만족림상화영상의사진단수요적도상전제하，강저환자적복사제량，유효보호수검자，대폭도적강저료구관소모，감소료설비적모손，연장료설비적사용수명。
Objective:To assess the diagnostic value of low-dose 16 slices helical CT study in thoracic injury.Method:30 patients with thoracic trauma underwent standard-dose(200 mA) CT study and low-dose followup CT study (50 mA) within a short period.Diagnostic value,image quality and radiation dose of these two studies were compared.Result:There was no statistical significant difference between the two examinations in revealing injury.Although there was more noise in the low-dose study image in mediastinal window,image quality was acceptable and it did not affect the diagnosis.Low dose CT exam can reduce the radiation dose dramatically.CTDIvol and DLP decrease about 75%on average.Conclusion:The low-dose 16 slices helical CT scan is suitable for thoracic trauma study.On the premise of image quality,this method could not only reduce the radiation dose,but also could extend the device life.