PDF(Pubmed)
Abstract：
UNASSIGNED: The relationship between graft maturity on magnetic resonance imaging (MRI) and return to sports (RTS) after anterior cruciate ligament (ACL) reconstruction is unclear.
UNASSIGNED: To compare signal-to-noise quotient (SNQ) values and ACL graft T2* (gradient echo) values between patients who did RTS and those who did not RTS (NRTS) after ACL reconstruction and to evaluate the predictive value of T2* mapping for RTS after ACL reconstruction.
UNASSIGNED: Case-control study; Level of evidence, 3.
UNASSIGNED: At a minimum of 9 months after arthroscopic single-bundle ACL reconstruction with autologous hamstring tendon graft, 82 patients underwent RTS assessment as well as MRI evaluation. The patients were classified into RTS (n = 53) and NRTS (n = 29) groups based on the results of the assessment. The SNQ values in the proximal, middle, and distal regions of the graft and the T2* values of the graft were measured on MRI. The correlation between T2* values and RTS was assessed using Spearman correlation analysis. Receiver operating characteristic curves were constructed to compare the diagnostic performance, and the optimal T2* cutoff value for detecting RTS was determined based on the maximum Youden index.
UNASSIGNED: At 9 months after ACL reconstruction, the proximal, middle, and mean SNQ values in the RTS group were significantly lower than those in the NRTS group (proximal: 17.15 ± 4.85 vs 19.55 ± 5.05, P = .038; middle: 13.45 ± 5.15 vs. 17.75 ± 5.75, P = .001; mean: 12.37 ± 2.74 vs 15.07 ± 3.32, P < .001). The T2* values were lower in the RTS group (14.92 ± 2.28 vs 17.69 ± 2.48; P < .001) and were correlated with RTS (r = -0.41; P = .02). The area under the curve of T2* was 0.79 (95% CI, 0.75-0.83), and the optimal cutoff value for T2* was 16.65, with a sensitivity and specificity for predicting failure to RTS of 67.9% and 88.2%, respectively.
UNASSIGNED: Study findings indicated that the SNQs (mean, proximal, and middle) and the T2* values of the graft in the RTS group were significantly lower than those in NRTS group. A T2* value of 16.65 was calculated to predict patients who failed RTS tests with a sensitivity of 67.9% and specificity of 88.2%.
UNASSIGNED: To compare signal-to-noise quotient (SNQ) values and ACL graft T2* (gradient echo) values between patients who did RTS and those who did not RTS (NRTS) after ACL reconstruction and to evaluate the predictive value of T2* mapping for RTS after ACL reconstruction.
UNASSIGNED: Case-control study; Level of evidence, 3.
UNASSIGNED: At a minimum of 9 months after arthroscopic single-bundle ACL reconstruction with autologous hamstring tendon graft, 82 patients underwent RTS assessment as well as MRI evaluation. The patients were classified into RTS (n = 53) and NRTS (n = 29) groups based on the results of the assessment. The SNQ values in the proximal, middle, and distal regions of the graft and the T2* values of the graft were measured on MRI. The correlation between T2* values and RTS was assessed using Spearman correlation analysis. Receiver operating characteristic curves were constructed to compare the diagnostic performance, and the optimal T2* cutoff value for detecting RTS was determined based on the maximum Youden index.
UNASSIGNED: At 9 months after ACL reconstruction, the proximal, middle, and mean SNQ values in the RTS group were significantly lower than those in the NRTS group (proximal: 17.15 ± 4.85 vs 19.55 ± 5.05, P = .038; middle: 13.45 ± 5.15 vs. 17.75 ± 5.75, P = .001; mean: 12.37 ± 2.74 vs 15.07 ± 3.32, P < .001). The T2* values were lower in the RTS group (14.92 ± 2.28 vs 17.69 ± 2.48; P < .001) and were correlated with RTS (r = -0.41; P = .02). The area under the curve of T2* was 0.79 (95% CI, 0.75-0.83), and the optimal cutoff value for T2* was 16.65, with a sensitivity and specificity for predicting failure to RTS of 67.9% and 88.2%, respectively.
UNASSIGNED: Study findings indicated that the SNQs (mean, proximal, and middle) and the T2* values of the graft in the RTS group were significantly lower than those in NRTS group. A T2* value of 16.65 was calculated to predict patients who failed RTS tests with a sensitivity of 67.9% and specificity of 88.2%.
摘要：
■磁共振成像（MRI）上的移植物成熟度与前交叉韧带（ACL）重建后恢复运动（RTS）之间的关系尚不清楚。
■比较ACL重建后进行RTS和未进行RTS（NRTS）的患者之间的信噪比（SNQ）值和ACL移植物T2*（梯度回波）值，并评估ACL重建后RTS的T2*映射的预测值。
■病例对照研究；证据水平，3.
■在关节镜下使用自体绳肌腱移植进行单束ACL重建后至少9个月，82例患者接受了RTS评估以及MRI评估。根据评估结果将患者分为RTS（n=53）和NRTS（n=29）组。近端中的SNQ值，中间,在MRI上测量移植物的远端区域和移植物的T2*值。使用Spearman相关分析评估T2*值与RTS之间的相关性。构建了接收器工作特性曲线以比较诊断性能，并根据最大Youden指数确定检测RTS的最佳T2*截止值。
■ACL重建后9个月，近端，中间,RTS组的SNQ值和平均SNQ值显着低于NRTS组（近端：17.15±4.85vs19.55±5.05，P=.038；中间：13.45±5.15vs.17.75±5.75，P=.001；平均值：12.37±2.74vs15.07±3.32，P<.001）。RTS组的T2*值较低（14.92±2.28vs17.69±2.48；P<.001），并且与RTS相关（r=-0.41；P=.02）。T2*曲线下面积为0.79(95%CI,0.75-0.83),T2*的最佳临界值为16.65，预测RTS失败的敏感性和特异性分别为67.9％和88.2％，分别。
■研究结果表明，SNQ(平均值，近端,和中）和RTS组移植物的T2*值显着低于NRTS组。计算的T2*值为16.65，以预测未能通过RTS测试的患者，其敏感性为67.9％，特异性为88.2％。
■比较ACL重建后进行RTS和未进行RTS（NRTS）的患者之间的信噪比（SNQ）值和ACL移植物T2*（梯度回波）值，并评估ACL重建后RTS的T2*映射的预测值。
■病例对照研究；证据水平，3.
■在关节镜下使用自体绳肌腱移植进行单束ACL重建后至少9个月，82例患者接受了RTS评估以及MRI评估。根据评估结果将患者分为RTS（n=53）和NRTS（n=29）组。近端中的SNQ值，中间,在MRI上测量移植物的远端区域和移植物的T2*值。使用Spearman相关分析评估T2*值与RTS之间的相关性。构建了接收器工作特性曲线以比较诊断性能，并根据最大Youden指数确定检测RTS的最佳T2*截止值。
■ACL重建后9个月，近端，中间,RTS组的SNQ值和平均SNQ值显着低于NRTS组（近端：17.15±4.85vs19.55±5.05，P=.038；中间：13.45±5.15vs.17.75±5.75，P=.001；平均值：12.37±2.74vs15.07±3.32，P<.001）。RTS组的T2*值较低（14.92±2.28vs17.69±2.48；P<.001），并且与RTS相关（r=-0.41；P=.02）。T2*曲线下面积为0.79(95%CI,0.75-0.83),T2*的最佳临界值为16.65，预测RTS失败的敏感性和特异性分别为67.9％和88.2％，分别。
■研究结果表明，SNQ(平均值，近端,和中）和RTS组移植物的T2*值显着低于NRTS组。计算的T2*值为16.65，以预测未能通过RTS测试的患者，其敏感性为67.9％，特异性为88.2％。
