CAJ | 학술논문

目的：对低剂量多层螺旋C T扫描在肋骨骨折检查中的应用进行分析。方法对40例肋骨骨折患者行常规剂量（a组／机器设定345mA）及三组低剂量（b、c、d组／150mA、50mA、30mA）的薄层CT扫描，比较四组数据的图像质量、诊断能力及患者接受辐射剂量。结果图像质量较好以上的a组100％（40／40）、b组97．5％（39／40）、c组92．5％（37／40）、d组87．5％（35／40）。a组诊断肋骨骨折231处、可疑骨折6处；b组诊断肋骨骨折227处、可疑4处；c组诊断肋骨骨折225处、可疑骨折5处；d组诊断肋骨骨折229处、可疑骨折6处。四组数据平均CTDI分别为（14．52±0．18）mGy、（7.23±0．05）mGy、（2．52±0．23）mGy、（1．34±0．06）mGy ，平均DLP分别为（639．64±10．63）mGy、（316．55 ± 0．61） mGy、（100．37 ± 4．01）mGy、（59．23 ± 2．35）mGy。结论低剂量多层螺旋CT 扫描技术能够明显减低患者辐射剂量，且图像质量基本满足临床诊断需要。
목적：대저제량다층라선C T소묘재륵골골절검사중적응용진행분석。방법대40례륵골골절환자행상규제량（a조／궤기설정345mA）급삼조저제량（b、c、d조／150mA、50mA、30mA）적박층CT소묘，비교사조수거적도상질량、진단능력급환자접수복사제량。결과도상질량교호이상적a조100％（40／40）、b조97．5％（39／40）、c조92．5％（37／40）、d조87．5％（35／40）。a조진단륵골골절231처、가의골절6처；b조진단륵골골절227처、가의4처；c조진단륵골골절225처、가의골절5처；d조진단륵골골절229처、가의골절6처。사조수거평균CTDI분별위（14．52±0．18）mGy、（7.23±0．05）mGy、（2．52±0．23）mGy、（1．34±0．06）mGy ，평균DLP분별위（639．64±10．63）mGy、（316．55 ± 0．61） mGy、（100．37 ± 4．01）mGy、（59．23 ± 2．35）mGy。결론저제량다층라선CT 소묘기술능구명현감저환자복사제량，차도상질량기본만족림상진단수요。
Objective To explore and analyse the clinical application of low doses of MSCT scanning in rib fracture . Methods 40 patients with rib fractures were performed examinations including routine dose (group A machine setting 345 mA) and low dose(group B ,C ,D /150 mA ,50 mA ,30 mA) thin layer CT scan .Then ,the quality of images ,diagnostic ability of the two methods and the dose of radiation were compared .Results 100% (40/40) of the image is good image in group A ,group B is 97 .5% (39/40) ,group C is 92 .5% (37/40) ,group D is 87 .5% (35/40) .231 rib fractures and 6 sus‐pected fractures are diagnosed in group A ,group B has 227 rib fractures and 4 suspected fractures ,group C has 225 rib fractures and 5 suspected fractures ,and group D has 229 rib fractures and 6 suspected fractures .The average CT Dose In‐dex of four group(A ,B ,C ,D) are (14 .52 ± 0 .18) mGy ,(7 .23 ± 0 .05) mGy ,(2 .52 ± 0 .23) mGy and (1 .34 ± 0 .06) mGy .The average Dose Length Products are (639 .64 ± 10 .63) mGy ,(316 .55 ± 0 .61) mGy ,(100 .37 ± 4 .01) mGy and (59 .23 ± 2 .35) mGy .Conclusion Low doses of multi‐slice spiral CT scan can obviously reduce the patient radiation dose , and provide satisfactory inages for the clinical diagnosis .