Abstract：
OBJECTIVE: To study the medial meniscus extrusion (MME) in subjects with and without medial meniscal tears on magnetic resonance imaging (MRI), supine ultrasound (US), and weight-bearing US.
METHODS: Forty-seven cases (mean age 43.7 years) with medial meniscus tears and 53 healthy controls (mean age 36.6 years) were assessed. Two experienced sonographers performed the US evaluations, and a fellowship-trained musculoskeletal radiologist assessed the menisci on MRI. Independent and paired T-tests and ICC were used for statistical analyses.
RESULTS: On supine US, the mean MME was 3.9 mm for the cases and 2.3 mm for the controls (p < 0.001). On weight-bearing US, the values were 4.2 and 2.8 mm (p < 0.001), and on MRI 3.0 and 2.0 mm (p < 0.001), respectively. The mean difference between supine and weight-bearing US extrusion was 0.38 mm for the cases and 0.49 mm for the controls (p = 0.291). Correlation between supine US and MRI MME measurements was good (ICC = 0.660, CIs [0.533-0.758]).
CONCLUSIONS: MME can be assessed using US with good correlation to MRI. US-observed extrusion was significantly increased in supine and standing positions for medial meniscus tears. The mean difference between examination positions was reduced with medial meniscus tears although this result was statistically insignificant.
METHODS: Forty-seven cases (mean age 43.7 years) with medial meniscus tears and 53 healthy controls (mean age 36.6 years) were assessed. Two experienced sonographers performed the US evaluations, and a fellowship-trained musculoskeletal radiologist assessed the menisci on MRI. Independent and paired T-tests and ICC were used for statistical analyses.
RESULTS: On supine US, the mean MME was 3.9 mm for the cases and 2.3 mm for the controls (p < 0.001). On weight-bearing US, the values were 4.2 and 2.8 mm (p < 0.001), and on MRI 3.0 and 2.0 mm (p < 0.001), respectively. The mean difference between supine and weight-bearing US extrusion was 0.38 mm for the cases and 0.49 mm for the controls (p = 0.291). Correlation between supine US and MRI MME measurements was good (ICC = 0.660, CIs [0.533-0.758]).
CONCLUSIONS: MME can be assessed using US with good correlation to MRI. US-observed extrusion was significantly increased in supine and standing positions for medial meniscus tears. The mean difference between examination positions was reduced with medial meniscus tears although this result was statistically insignificant.
摘要：
目的：在磁共振成像（MRI）上研究有和没有内侧半月板撕裂的受试者的内侧半月板挤压（MME），仰卧超声（美国），和负重的美国。
方法：评估了47例（平均年龄43.7岁）的内侧半月板撕裂和53例健康对照（平均年龄36.6岁）。两名有经验的超声医师进行了美国评估，受过研究训练的肌肉骨骼放射科医生在MRI上评估了半月板。使用独立和配对T检验和ICC进行统计分析。
结果：仰卧美国，病例的平均MME为3.9mm,对照组为2.3mm(p<0.001).在承重的美国，值分别为4.2和2.8mm（p<0.001），MRI为3.0和2.0mm（p<0.001），分别。仰卧和负重US挤压之间的平均差异在病例中为0.38mm，在对照组中为0.49mm（p=0.291）。仰卧位US和MRIMME测量值之间的相关性良好（ICC=0.660，CIs[0.533-0.758]）。
结论：MME可以使用US评估，与MRI具有良好的相关性。对于内侧半月板撕裂，美国观察到的仰卧和站立姿势的挤压显着增加。检查位置之间的平均差异随着内侧半月板撕裂而减小，尽管该结果在统计学上无统计学意义。
方法：评估了47例（平均年龄43.7岁）的内侧半月板撕裂和53例健康对照（平均年龄36.6岁）。两名有经验的超声医师进行了美国评估，受过研究训练的肌肉骨骼放射科医生在MRI上评估了半月板。使用独立和配对T检验和ICC进行统计分析。
结果：仰卧美国，病例的平均MME为3.9mm,对照组为2.3mm(p<0.001).在承重的美国，值分别为4.2和2.8mm（p<0.001），MRI为3.0和2.0mm（p<0.001），分别。仰卧和负重US挤压之间的平均差异在病例中为0.38mm，在对照组中为0.49mm（p=0.291）。仰卧位US和MRIMME测量值之间的相关性良好（ICC=0.660，CIs[0.533-0.758]）。
结论：MME可以使用US评估，与MRI具有良好的相关性。对于内侧半月板撕裂，美国观察到的仰卧和站立姿势的挤压显着增加。检查位置之间的平均差异随着内侧半月板撕裂而减小，尽管该结果在统计学上无统计学意义。
