CT‐based sex estimation on human femora using statistical shape modeling

Fliss, Barbara; Luethi, Marcel; Fuernstahl, Philipp; Christensen, Angi M.; Sibold, Ken; Thali, Michael J.; Ebert, Lars C.

doi:10.1002/ajpa.23828

Cited by 18 publications

(6 citation statements)

References 51 publications

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“…It is often achievable by using anthropometric parameters derived from anonymous skeletal structures that readily showed sexual dimorphism. 16,17 Based on the results of this study, proximal femoral dimensions showed non-significant bilateral differences with the right side having higher values in all parameters of study except femoral neck length in males (Table 1) and femoral neck diameter in females ( Table 2). The results further showed prominent sexual dimorphism in all parameters of study with the males having significantly (p<0.05) higher values than their female counterparts (Table 3).…”

Section: Discussionmentioning

confidence: 70%

Morphological evaluation and clinical significance of proximal femoral dimensions among Southern Nigerian population

Obikili

Omotoso

2020

Int J Res Med Sci

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Background: Anthropometric studies are vital in evaluation and description of morphological characteristics of body tissues of living individuals or dead remains. This study was done to evaluate proximal femoral dimensions and to describe sexual or bilateral dimorphism among Southern Nigerians.Methods: This study involved 500 pelvic radiographs showing proximal aspects of right and left femurs of Southern Nigerians (including 250 males and 250 females) between ages 25 to 55 years. Measurements taken on radiographs include transverse diameter and vertical diameter of femoral head, neck diameter (ND), neck length (NL) and proximal shaft diameter. Bilateral measurements were recorded and average values evaluated. Data were analyzed using IBM-statistical package for social sciences (SPSS) (version 20) and statistical comparison was done using analysis of variance (ANOVA) with p<0.05 regarded as statistically significant level.Results: Proximal femoral dimensions showed non-significant bilateral differences with right side having higher values in all parameters except NL in males and ND in females. Also, mean values for TD (5.39±0.25 and 4.28±0.21), VD (5.01±0.21 and 4.58±0.19), ND (4.03±0.22 and 3.61±0.18), NL (2.08±0.11 and 1.79±0.10) for male and females subjects respectively showed sexual dimorphism in all parameters with males having significantly (p<0.05) higher values than females.Conclusions: The femur is an important bone in human body that plays crucial morphological and physiological role and offers prominent anthropometric value.

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Section: Discussionmentioning

confidence: 70%

Morphological evaluation and clinical significance of proximal femoral dimensions among Southern Nigerian population

Obikili

Omotoso

2020

Int J Res Med Sci

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Section: Methodsmentioning

confidence: 99%

“…Based on 61 femora from routine postmortem CT scans, a previously published statistical shape model of the human femora was used [ 12 ]. To create this model, a non-rigid registration algorithm [ 29 ] was used and 20 principal components were defined to represent 99% of the shape variance [ 12 ]. Using Autodesk Inventor (Autodesk Inc., San Rafael, USA), biplanar DFO were created with a horizontal osteotomy angle of 25° for MCW and 18° for LOW, respectively (Fig.…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of medial closing and lateral opening wedge osteotomies of the distal femur in relation to hinge fractures

et al. 2023

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Purpose Intraoperative hinge fractures in distal femur osteotomies represent a risk factor for loss of alignment and non-union. Using finite element analysis, the goal of this study was to investigate the influence of different hinge widths and osteotomy corrections on hinge fractures in medial closed-wedge and lateral open-wedge distal femur osteotomies. Methods The hinge was located at the proximal margin of adductor tubercle for biplanar lateral open-wedge and at the upper border of the lateral femoral condyle for biplanar medial closed-wedge distal femur osteotomies, corresponding to optimal hinge positions described in literature. Different hinge widths (5, 7.5, 10 mm) were created and the osteotomy correction was opened/closed by 5, 7.5 and 10 mm. Tensile and compressive strain of the hinge was determined in a finite element analysis and compared to the ultimate strain of cortical bone to assess the hinge fracture risk. Results Doubling the correction from 5 to 10 mm increased mean tensile and compressive strain by 50% for lateral open-wedge and 48% for medial closed-wedge osteotomies. A hinge width of 10 mm versus 5 mm showed increased strain in the hinge region of 61% for lateral open-wedge and 32% for medial closed-wedge osteotomies. Medial closed-wedge recorded a higher fracture risk compared to lateral open-wedge osteotomies due to a larger hinge cross-section area (60–67%) for all tested configurations. In case of a 5 mm hinge, medial closed-wedge recorded 71% higher strain in the hinge region compared to lateral open-wedge osteotomies. Conclusion Due to morphological features of the medial femoral condyle, finite element analysis suggests that lateral-open wedge osteotomies are the preferable option if larger corrections are intended, as a thicker hinge can remain without an increased hinge fracture risk.

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“…Additionally, dentition staging and development are highly useful in age assessment of juveniles [ 59 ]. Some techniques, such as statistical shape modeling, require 3D models extracted from PMCT data, and these models could be automatically extracted using automated segmentation [ 60 ].…”

Section: Possible Applications Of Deep Learning Techniques In Pmctmentioning

confidence: 99%

Potential use of deep learning techniques for postmortem imaging

Dobay

Ford

Decker

et al. 2020

Forensic Sci Med Pathol

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The use of postmortem computed tomography in forensic medicine, in addition to conventional autopsy, is now a standard procedure in several countries. However, the large number of cases, the large amount of data, and the lack of postmortem radiology experts have pushed researchers to develop solutions that are able to automate diagnosis by applying deep learning techniques to postmortem computed tomography images. While deep learning techniques require a good understanding of image analysis and mathematical optimization, the goal of this review was to provide to the community of postmortem radiology experts the key concepts needed to assess the potential of such techniques and how they could impact their work.

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CT‐based sex estimation on human femora using statistical shape modeling

Cited by 18 publications

References 51 publications

Morphological evaluation and clinical significance of proximal femoral dimensions among Southern Nigerian population

Morphological evaluation and clinical significance of proximal femoral dimensions among Southern Nigerian population

Finite element analysis of medial closing and lateral opening wedge osteotomies of the distal femur in relation to hinge fractures

Potential use of deep learning techniques for postmortem imaging

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