Abstract:To study the usage of 3D imaging technology in measuring the length of myopectineal orifice, the width of the upper region of myopectineal orifice, the width of the lower region of myopectineal orifice, the total width of myopectineal orifice, and the angle between the upper and the lower regions of myopectineal orifice. Methods We first scanned thin layer CT of 105 patients with inguinal hernia from January to April 2018. Then export DICOM files, and using the Mimics 19.0 of software to build 3D images and 3D model. Finally, further accurate measure the size of myopectineal orifice, including the length, width of the upper region, width of the lower region, total width and the angle between the upper and the lower regions of myopectineal orifice. Results The length of myopectineal orifice is (7.4 ± 0.3) cm, the width of the upper region of myopectineal orifice is (5.3 ± 0.4) cm, the width of the lower region of myopectineal orifice is (2.7 ± 0.2) cm, the total width of myopectineal orifice is (7.9 ± 0.4) cm, the angle between the upper and the lower regions of myopectineal orifice is (123.1 ± 3.7)°. The success rate of endoscopic surgery was 100%, and the recurrence rate within half a year was 0%. Conclusion The inguinal hernia with folded patch to repair myopectineal orifice is more appropriate, the upper cover is not less than 7.4 cm (length) × 5.3 cm (high) area of the triangle fan area, the lower cover is not less than 7.4 cm (length) × 2.7 cm (high) triangle fan area. The angle between upper and lower areas is around 123.1°. Our research can measure myopectineal orifice more accurately, providing a theoretical data for endoscopic preperitoneal tension-free hernioplasty of inguinal hernia. Providing data support for patch design and cutting, and laying the foundation for the individualized endoscopic treatment program in the future.