Department of Oncology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China.
Department of Orthopedic Surgery, People's Hospital of Chongqing Banan District, Chongqing, 401320, People's Republic of China.
Sci Rep. 2022 Nov 15;12(1):19579. doi: 10.1038/s41598-022-21660-z.
We introduced a novel method based on the iPhone's intrinsic photo edit function to measure sagittal parameters of the cervical spine. This study aimed to assess the validity of this new method compared with the picture archiving and communication system (PACS) method (the gold standard) and to test the reliability of this novel technique. One hundred consecutive patients admitted to our hospital diagnosed with cervical spondylotic myelopathy or cervical spondylotic radiculopathy were retrospectively reviewed. Four angles, including the C0-2 Cobb angle, C2-7 Cobb angle, T1S and neck tilt (NT), were assessed by iPhone and PACS. The validity and reliability were evaluated, and the time taken by both methods was compared. The ICCs of the validity of the C0-2 Cobb angle, C2-7 Cobb angle, T1S and NT were 0.960, 0.976, 0.980 and 0.946, respectively. The ICCs of the intraobserver reliability of the C0-2 Cobb angle, C2-7 Cobb angle, T1S and NT were 0.966, 0.983, 0.971 and 0.951, respectively. The ICCs of the interobserver reliability of the C0-2 Cobb angle, C2-7 Cobb angle, T1S and NT were 0.953, 0.972, 0.957 and 0.929, respectively. The Bland‒Altman plot of validity of the four angles revealed mean differences of 0.3, 0.2, 0.1, and 0.1 degrees with 95% CIs of 4.1, 4.1, 2.9, and 4.3 degrees, respectively. The iPhone measurement time (58.55 ± 4.17 s) was significantly less than that by the PACS (70.40 ± 2.92 s) when compared by the independent-samples T test (P < 0.001). This novel method using the iPhone's intrinsic photo edit function is accurate, reliable, fast and convenient when measuring cervical sagittal parameters.
我们介绍了一种基于 iPhone 内置照片编辑功能的新方法来测量颈椎矢状参数。本研究旨在评估该新方法与图片存档和通信系统（PACS）方法（金标准）相比的有效性，并测试该新技术的可靠性。我们回顾性分析了 100 例连续因颈椎病性脊髓病或颈椎病性神经根病就诊于我院的患者。使用 iPhone 和 PACS 评估了 4 个角度，包括 C0-2 Cobb 角、C2-7 Cobb 角、T1S 和颈部倾斜角（NT）。评估了有效性和可靠性，并比较了两种方法所花费的时间。C0-2 Cobb 角、C2-7 Cobb 角、T1S 和 NT 的有效性的 ICC 分别为 0.960、0.976、0.980 和 0.946。C0-2 Cobb 角、C2-7 Cobb 角、T1S 和 NT 的观察者内可靠性的 ICC 分别为 0.966、0.983、0.971 和 0.951。C0-2 Cobb 角、C2-7 Cobb 角、T1S 和 NT 的观察者间可靠性的 ICC 分别为 0.953、0.972、0.957 和 0.929。四个角度的有效性的 Bland-Altman 图显示，平均差异为 0.3、0.2、0.1 和 0.1 度，95%置信区间分别为 4.1、4.1、2.9 和 4.3 度。与独立样本 T 检验相比，iPhone 测量时间（58.55±4.17 s）明显短于 PACS（70.40±2.92 s）（P<0.001）。当测量颈椎矢状参数时，使用 iPhone 内置照片编辑功能的这种新方法准确、可靠、快速、方便。
