Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy
Abstract Background Computer-assisted techniques for surgical treatment of femoral deformities have become increasingly important. In state-of-the-art 3D deformity assessments, the contralateral side is used as template for correction as it commonly represents normal anatomy. Contributing to this, a...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2022-11-01
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| Series: | BMC Musculoskeletal Disorders |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12891-022-05941-2 |
| _version_ | 1828197884450832384 |
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| author | Armando Hoch Julian Hasler Pascal Schenk Jakob Ackermann Lars Ebert Philipp Fürnstahl Patrick Zingg Lazaros Vlachopoulos |
| author_facet | Armando Hoch Julian Hasler Pascal Schenk Jakob Ackermann Lars Ebert Philipp Fürnstahl Patrick Zingg Lazaros Vlachopoulos |
| author_sort | Armando Hoch |
| collection | DOAJ |
| description | Abstract Background Computer-assisted techniques for surgical treatment of femoral deformities have become increasingly important. In state-of-the-art 3D deformity assessments, the contralateral side is used as template for correction as it commonly represents normal anatomy. Contributing to this, an iterative closest point (ICP) algorithm is used for registration. However, the anatomical sections of the femur with idiosyncratic features, which allow for a consistent deformity assessment with ICP algorithms being unknown. Furthermore, if there is a side-to-side difference, this is not considered in error quantification. The aim of this study was to analyze the influence and value of the different sections of the femur in 3D assessment of femoral deformities based on the contralateral anatomy. Material and methods 3D triangular surface models were created from CT of 100 paired femurs (50 cadavers) without pathological anatomy. The femurs were divided into sections of eponymous anatomy of a predefined percentage of the whole femoral length. A surface registration algorithm was applied to superimpose the ipsilateral on the contralateral side. We evaluated 3D femoral contralateral registration (FCR) errors, defined as difference in 3D rotation of the respective femoral section before and after registration to the contralateral side. To compare this method, we quantified the landmark-based femoral torsion (LB FT). This was defined as the intra-individual difference in overall femoral torsion using with a landmark-based method. Results Contralateral rotational deviation ranged from 0° to 9.3° of the assessed femoral sections, depending on the section. Among the sections, the FCR error using the proximal diaphyseal area for registration was larger than any other sectional error. A combination of the lesser trochanter and the proximal diaphyseal area showed the smallest error. The LB FT error was significantly larger than any sectional error (p < 0.001). Conclusion We demonstrated that if the contralateral femur is used as reconstruction template, the built-in errors with the registration-based approach are smaller than the intraindividual difference of the femoral torsion between both sides. The errors are depending on the section and their idiosyncratic features used for registration. For rotational osteotomies a combination of the lesser trochanter and the proximal diaphyseal area sections seems to allow for a reconstruction with a minimal error. |
| first_indexed | 2024-04-12T10:28:20Z |
| format | Article |
| id | doaj.art-709144475ac44c3bbb7cbc2426b9b113 |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-04-12T10:28:20Z |
| publishDate | 2022-11-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-709144475ac44c3bbb7cbc2426b9b1132022-12-22T03:36:55ZengBMCBMC Musculoskeletal Disorders1471-24742022-11-0123111110.1186/s12891-022-05941-2Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomyArmando Hoch0Julian Hasler1Pascal Schenk2Jakob Ackermann3Lars Ebert4Philipp Fürnstahl5Patrick Zingg6Lazaros Vlachopoulos7Department of Orthopaedics, Balgrist University Hospital, University of ZurichDepartment of Orthopaedics, Balgrist University Hospital, University of ZurichDepartment of Orthopaedics, Balgrist University Hospital, University of ZurichDepartment of Orthopaedics, Balgrist University Hospital, University of ZurichZurich Institute of Forensic Medicine, University of ZurichResearch in Orthopaedic Computer Science, Balgrist University Hospital, University of ZurichDepartment of Orthopaedics, Balgrist University Hospital, University of ZurichDepartment of Orthopaedics, Balgrist University Hospital, University of ZurichAbstract Background Computer-assisted techniques for surgical treatment of femoral deformities have become increasingly important. In state-of-the-art 3D deformity assessments, the contralateral side is used as template for correction as it commonly represents normal anatomy. Contributing to this, an iterative closest point (ICP) algorithm is used for registration. However, the anatomical sections of the femur with idiosyncratic features, which allow for a consistent deformity assessment with ICP algorithms being unknown. Furthermore, if there is a side-to-side difference, this is not considered in error quantification. The aim of this study was to analyze the influence and value of the different sections of the femur in 3D assessment of femoral deformities based on the contralateral anatomy. Material and methods 3D triangular surface models were created from CT of 100 paired femurs (50 cadavers) without pathological anatomy. The femurs were divided into sections of eponymous anatomy of a predefined percentage of the whole femoral length. A surface registration algorithm was applied to superimpose the ipsilateral on the contralateral side. We evaluated 3D femoral contralateral registration (FCR) errors, defined as difference in 3D rotation of the respective femoral section before and after registration to the contralateral side. To compare this method, we quantified the landmark-based femoral torsion (LB FT). This was defined as the intra-individual difference in overall femoral torsion using with a landmark-based method. Results Contralateral rotational deviation ranged from 0° to 9.3° of the assessed femoral sections, depending on the section. Among the sections, the FCR error using the proximal diaphyseal area for registration was larger than any other sectional error. A combination of the lesser trochanter and the proximal diaphyseal area showed the smallest error. The LB FT error was significantly larger than any sectional error (p < 0.001). Conclusion We demonstrated that if the contralateral femur is used as reconstruction template, the built-in errors with the registration-based approach are smaller than the intraindividual difference of the femoral torsion between both sides. The errors are depending on the section and their idiosyncratic features used for registration. For rotational osteotomies a combination of the lesser trochanter and the proximal diaphyseal area sections seems to allow for a reconstruction with a minimal error.https://doi.org/10.1186/s12891-022-05941-23D imagingComputer assisted surgeryFemoral torsionFemoral osteotomy |
| spellingShingle | Armando Hoch Julian Hasler Pascal Schenk Jakob Ackermann Lars Ebert Philipp Fürnstahl Patrick Zingg Lazaros Vlachopoulos Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy BMC Musculoskeletal Disorders 3D imaging Computer assisted surgery Femoral torsion Femoral osteotomy |
| title | Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy |
| title_full | Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy |
| title_fullStr | Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy |
| title_full_unstemmed | Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy |
| title_short | Registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy |
| title_sort | registration based assessment of femoral torsion for rotational osteotomies based on the contralateral anatomy |
| topic | 3D imaging Computer assisted surgery Femoral torsion Femoral osteotomy |
| url | https://doi.org/10.1186/s12891-022-05941-2 |
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