CAJ | 학술논문

目的：通过对20副正常模型的128层螺旋CT测量结果与传统手工测量结果进行比较，验证128层螺旋CT系统的可靠性、可重复性、精确性。方法应用128层螺旋CT机对正常模型进行容积扫描、数据采集，并进行函数重建得到0.6 mm层厚图像，传送至配套3D工作站、Dental（齿科软件）、Inspace（4D无间断实时互动三维成像技术）等软件，利用轴位图像、MPR（多平面重建）、CPR （曲面重建）、VR（容积重建）等方法测量正常模型的上、下颌牙的牙齿宽度，牙弓长度、宽度等相关指标；同时用游标卡尺手工测量上述指标，将两种测量方法所得数据进行比较。结果两种测量方法具有相似的平行效度。CT系统的测量误差为-0.02～0.02 mm，精确度较高。结论128层螺旋CT可以满足临床正畸需要。
목적：통과대20부정상모형적128층라선CT측량결과여전통수공측량결과진행비교，험증128층라선CT계통적가고성、가중복성、정학성。방법응용128층라선CT궤대정상모형진행용적소묘、수거채집，병진행함수중건득도0.6 mm층후도상，전송지배투3D공작참、Dental（치과연건）、Inspace（4D무간단실시호동삼유성상기술）등연건，이용축위도상、MPR（다평면중건）、CPR （곡면중건）、VR（용적중건）등방법측량정상모형적상、하합아적아치관도，아궁장도、관도등상관지표；동시용유표잡척수공측량상술지표，장량충측량방법소득수거진행비교。결과량충측량방법구유상사적평행효도。CT계통적측량오차위-0.02～0.02 mm，정학도교고。결론128층라선CT가이만족림상정기수요。
Objective To verify the reliability, repeatability and accuracy of 128-slice spiral CT through comparing the measurement results of 128-slice spiral CT of 20 normal chin models with those of traditional manual measurement results.Methods The volume scanning with its data collection of normal chin models were conducted with 128-slice spiral CT. Then the images whose slice thicknesses were 0.6 mm were obtained through function reconstruction and then were transferred to various softwares including the 3D workstation, Dental and Inspace. The related indicators including the teeth width, dental arch length and dental arch width of maxillary and mandibular teeth were measured with axial images, MPR (Multiplanar Reconstruction), CPR (Curve Planar Reconstruction) and VR (Volume Reconstruction) while these indicators were also measured with vernier caliper manually. The measurement data collected from those two methods were analyzed and compared.Results The parallel validity of manual measurement was similar to CT measurement whose measurement error was-0.02~0.02 mm.Conclusion 128-slice spiral CT can meet the clinical orthodontic requirements.