In this paper, the change characteristics of sagittal parameters of the patient’s body before and after anterior cervical surgery and rehabilitation effect were analyzed. The rotation transformation and perspective projection transformation were applied to construct a positive and lateral position (PLP) matching-based three-dimensional reconstruction (PLP-3DR) algorithm, which was compared with the marching cubes (MC) algorithm and gravity point (GP) algorithm. PLP-3DR was adopted in X-ray image diagnosis of 124 cervical spondylosis patients. Results showed that sensitivity, specificity, and accuracy of PLP-3DR were markedly higher than those of MC and GP (). The postoperative C2-7 Cobbs’s angle (C2-7Cobb) (11.27 ± 8.41°) was smaller than that before the surgery (15.03 ± 7.39°) (), while the postoperative cervical sagittal vertical axis (cSVA) (21.33 ± 10.38 mm) and Japanese Orthopaedic Association (JOA) scores (16.95 ± 6.07 points) were greater than those before the surgery (14.66 ± 9.68 mm and 11.39 ± 4.28 points) (). Besides, the improvement rate of patients from the cSVA >25 mm group (68.31%) was greater than the rate of the cSVA <15 mm group (45.88%) and the cSVA within 15–25 mm group (47.29%) (). In conclusion, PLP-3DR could effectively improve the diagnostic effect of spine X-ray film images, with high sensitivity and specificity. Anterior cervical surgery had a good curative effect for patients with cervical spondylosis and was closely related to cervical parameters (cSVA, T1 slope, and C2-7Cobb). In addition, patients with cSVA>25 mm could have the best postoperative rehabilitation effect.

中文翻译：

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基于智能三维重建算法的X线片分析颈椎前路手术矢状位参数变化及疗效

本文分析了颈椎前路手术前后患者身体矢状面参数的变化特点及康复效果。应用旋转变换和透视投影变换构建基于正横向位置（PLP）匹配的三维重建（PLP-3DR）算法，并与行进立方体（MC）算法和重心点（GP）进行比较算法。124例颈椎病患者采用PLP-3DR进行X线影像诊断。结果表明，PLP-3DR 的敏感性、特异性和准确性明显高于 MC 和 GP。）。术后C2-7 Cobbs角（C2-7Cobb）（11.27±8.41°）小于术前（15.03±7.39°）（)，而术后颈椎矢状纵轴 (cSVA) (21.33 ± 10.38 mm) 和日本骨科协会 (JOA) 评分 (16.95 ± 6.07 分) 均大于术前 (14.66 ± 9.68 mm 和 11.39 ± 4.28 分) (）。此外，cSVA > 25 mm 组患者的改善率（68.31%）大于 cSVA < 15 mm 组（45.88%）和 cSVA 15-25 mm 组（47.29%）（）。综上所述，PLP-3DR能够有效提高脊柱X线影像的诊断效果，具有较高的敏感性和特异性。颈椎前路手术治疗颈椎病患者疗效较好，且与颈椎参数（cSVA、T1斜率、C2-7Cobb）密切相关。此外，cSVA>25 mm的患者术后康复效果最好。