3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography
Abstract Background Cross-table lateral (CL) radiography is a convenient and feasible method to assess cup version angle (VA) after total hip arthroplasty; However, pelvic tilt (PT) may contribute to its measurement inaccuracy. How PT affects CL radiographic measurements have not been well studied....
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| Format: | Article |
| Language: | English |
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BMC
2020-12-01
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| Series: | BMC Musculoskeletal Disorders |
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| Online Access: | https://doi.org/10.1186/s12891-020-03858-2 |
| _version_ | 1818643655485816832 |
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| author | Jie Xu Baohua Su Wenhui Zhang Hao Sun Deng Li Zhiqing Cai Meiyi Chen Meiling Qiu Ruofan Ma |
| author_facet | Jie Xu Baohua Su Wenhui Zhang Hao Sun Deng Li Zhiqing Cai Meiyi Chen Meiling Qiu Ruofan Ma |
| author_sort | Jie Xu |
| collection | DOAJ |
| description | Abstract Background Cross-table lateral (CL) radiography is a convenient and feasible method to assess cup version angle (VA) after total hip arthroplasty; However, pelvic tilt (PT) may contribute to its measurement inaccuracy. How PT affects CL radiographic measurements have not been well studied. We sought (1) to determine the effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT. Methods We used 3D technique to construct standard model and capture CL radiography simulation. A linear regression model was created to analyze the relationship between PT and VA. CL radiography and computed tomography (CT) were performed for the enrolled patients after surgery. The consistency between CL and CT measurements were verified by intra-class correlation coefficient (ICC). Results There was a high correlation between the VA and PT. For each 1-degree increased in the PT, the VA decreased by 0.76° (R2 = 0.995, p < 0.001). Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The VA measurements corrected by our equation was in high agreement with the CT-measured values with reference to the corresponding PT (ICC = 0.988, p < 0.001), which was in sharp contrast to that without PT control (ICC = 0.454, p = 0.203). Conclusions The PT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography. |
| first_indexed | 2024-12-17T00:02:24Z |
| format | Article |
| id | doaj.art-ec8346b4f6f244ed80adbf98e774ec9d |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-17T00:02:24Z |
| publishDate | 2020-12-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-ec8346b4f6f244ed80adbf98e774ec9d2022-12-21T22:11:02ZengBMCBMC Musculoskeletal Disorders1471-24742020-12-012111710.1186/s12891-020-03858-23D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiographyJie Xu0Baohua Su1Wenhui Zhang2Hao Sun3Deng Li4Zhiqing Cai5Meiyi Chen6Meiling Qiu7Ruofan Ma8Department of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Orthopedic Surgery, the Third Affiliated Hospital of Guangzhou Medical UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityDepartment of Joint Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityAbstract Background Cross-table lateral (CL) radiography is a convenient and feasible method to assess cup version angle (VA) after total hip arthroplasty; However, pelvic tilt (PT) may contribute to its measurement inaccuracy. How PT affects CL radiographic measurements have not been well studied. We sought (1) to determine the effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT. Methods We used 3D technique to construct standard model and capture CL radiography simulation. A linear regression model was created to analyze the relationship between PT and VA. CL radiography and computed tomography (CT) were performed for the enrolled patients after surgery. The consistency between CL and CT measurements were verified by intra-class correlation coefficient (ICC). Results There was a high correlation between the VA and PT. For each 1-degree increased in the PT, the VA decreased by 0.76° (R2 = 0.995, p < 0.001). Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The VA measurements corrected by our equation was in high agreement with the CT-measured values with reference to the corresponding PT (ICC = 0.988, p < 0.001), which was in sharp contrast to that without PT control (ICC = 0.454, p = 0.203). Conclusions The PT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography.https://doi.org/10.1186/s12891-020-03858-2Version angleAcetabular componentCross-table lateral radiographyTotal hip arthroplastyPelvic tilt |
| spellingShingle | Jie Xu Baohua Su Wenhui Zhang Hao Sun Deng Li Zhiqing Cai Meiyi Chen Meiling Qiu Ruofan Ma 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography BMC Musculoskeletal Disorders Version angle Acetabular component Cross-table lateral radiography Total hip arthroplasty Pelvic tilt |
| title | 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography |
| title_full | 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography |
| title_fullStr | 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography |
| title_full_unstemmed | 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography |
| title_short | 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography |
| title_sort | 3d simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross table lateral radiography |
| topic | Version angle Acetabular component Cross-table lateral radiography Total hip arthroplasty Pelvic tilt |
| url | https://doi.org/10.1186/s12891-020-03858-2 |
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