Department of Radiology, NYU Langone Medical Center, 660 First Avenue, New York, NY, 10016, USA,
Skeletal Radiol. 2014 Feb;43(2):213-8. doi: 10.1007/s00256-013-1774-5. Epub 2013 Dec 7.
To assess the ability of 3D MR shoulder reconstructions to accurately quantify glenoid bone loss in the clinical setting using findings at the time of arthroscopy as the gold standard.
Retrospective review of patients with MR shoulder studies that included 3D MR reconstructions (3D MR) produced using an axial Dixon 3D-T1W-FLASH sequence at our institution was conducted with the following inclusion criteria: history of anterior shoulder dislocation, arthroscopy (OR) performed within 6 months of the MRI, and an estimate of glenoid bone loss made in the OR using the bare-spot method. Two musculoskeletal radiologists produced estimates of bone loss along the glenoid width, measured in mm and %, on 3D MR using the best-fit circle method, which were then compared to the OR measurements.
There were a total of 15 patients (13 men, two women; mean age, 28, range, 19-51 years). There was no significant difference, on average, between the MRI (mean 3.4 mm/12.6 %; range, 0-30 %) and OR (mean, 12.7 %; range, 0-30 %) measurements of glenoid bone loss (p = 0.767). A 95 % confidence interval for the mean absolute error extended from 0.45-2.21 %, implying that, when averaged over all patients, the true mean absolute error of the MRI measurements relative to the OR measurements is expected to be less than 2.21 %. Inter-reader agreement between the two readers had an IC of 0.92 and CC of 0.90 in terms of percentage of bone loss.
3D MR reconstructions of the shoulder can be used to accurately measure glenoid bone loss.
评估 3D MRI 肩关节重建在临床环境中准确量化肩盂骨丢失的能力，以关节镜检查时的发现作为金标准。
对我院行 3D MRI 肩关节重建（3D MRI）的患者进行回顾性研究，纳入标准为：有肩关节前脱位病史、MRI 后 6 个月内行关节镜检查、且术中采用“裸区法”评估肩盂骨丢失。两名肌肉骨骼放射科医生采用最佳拟合圆法，在 3D MRI 上评估肩盂宽度的骨丢失程度，分别以毫米和百分比进行测量，并与关节镜检查结果进行比较。
共纳入 15 例患者（13 名男性，2 名女性；平均年龄 28 岁，范围 19-51 岁）。MRI（平均 3.4mm/12.6%；范围 0-30%）和关节镜（平均 12.7%；范围 0-30%）测量的肩盂骨丢失平均值无显著差异（p=0.767）。95%置信区间的平均绝对误差范围为 0.45-2.21%，这意味着，在所有患者的平均值上，MRI 测量相对于关节镜测量的真实平均绝对误差预计小于 2.21%。两名放射科医生在百分比骨丢失方面的组内相关系数为 0.92，一致性系数为 0.90。
3D MRI 肩关节重建可用于准确测量肩盂骨丢失。
