CAJ | 학술논문

目的：探讨腰椎内固定术后T2-mapping成像定量评估邻近节段椎间盘退变的可行性和可重复性。方法24例患者于腰椎内固定术前1周内及术后6-8周分别行腰椎MR T2-mapping成像检查，并测量邻近节段椎间盘髓核的T2值。比较同一观察者不同时间和不同观察者之间测量结果的可重复性。结果24例患者均成功测量邻近节段椎间盘髓核的T2值。内固定近侧邻近椎间盘髓核术前和术后的T2值分别为93.2±22.3ms和95.5±20.1ms，差异无统计学意义(t=-1.00，P＞0.05)。远侧邻近椎间盘髓核术前和术后的T2值分别为87.9±27.7ms和83.7±23.0ms，差异无统计学意义(t=1.77，P＞0.05)。同一观察者或不同观察者间的组内相关系数(ICC)为0.85-0.94(P＜0.01)。结论腰椎内固定术后T2-mapping成像测量T2值是可行的，且可重复性高，有助于定量评估邻近节段椎间盘的退变情况。
목적：탐토요추내고정술후T2-mapping성상정량평고린근절단추간반퇴변적가행성화가중복성。방법24례환자우요추내고정술전1주내급술후6-8주분별행요추MR T2-mapping성상검사，병측량린근절단추간반수핵적T2치。비교동일관찰자불동시간화불동관찰자지간측량결과적가중복성。결과24례환자균성공측량린근절단추간반수핵적T2치。내고정근측린근추간반수핵술전화술후적T2치분별위93.2±22.3ms화95.5±20.1ms，차이무통계학의의(t=-1.00，P＞0.05)。원측린근추간반수핵술전화술후적T2치분별위87.9±27.7ms화83.7±23.0ms，차이무통계학의의(t=1.77，P＞0.05)。동일관찰자혹불동관찰자간적조내상관계수(ICC)위0.85-0.94(P＜0.01)。결론요추내고정술후T2-mapping성상측량T2치시가행적，차가중복성고，유조우정량평고린근절단추간반적퇴변정황。
Objective To explore the feasibility and reproducibility of MR T2-mapping technique in evaluating intervertebral disk degeneration of adjacent segment after internal fixation surgery.Methods Within 1 week preoperatively and 6 to 8 weeks postoperatively,24 patients were underwent T2-mapping examination. The T2 value of nucleus pulposus was measured by two senior MRI radiologists. To assess the reproducibility of this evaluation, inter-and intra-observer statistics were performed.Results The T2 values of 24 patients were measured successfully. The pre- and postoperative T2 values of the adjacent proximate disks were 93.2±22.3ms and 95.5±20.1ms respectively (t=-1.00,P>0.05),and the pre- and postoperative T2 values of the adjacent distal disks were 87.9±27.7ms and 83.7±23.0ms(t=1.77,P>0.05). The inter- and intra-observer analysis yielded intraclass correlation coefficients (ICC) for measures in a range from 0.85 to 0.94(P<0.01).Conclusion MR T2-mapping examination after internal fixation surgery is feasible, it will be a potential quantitative method in evaluating intervertebral disk degeneration of adjacent segment for its excellent reproducibility.