BACKGROUND: Precise positioning of the acetabular component during total hip replacement is the key to achieving optimal implant function and ensuring long-term patient comfort. However, different anatomical variations, degenerative changes, dysplasia, and other diseases make it difficult. In this study, we discuss a method based on the three-dimensional direction of the transverse ligament, predicting native acetabular anteversion with higher accuracy. METHODS: Angular positions of the acetabulum and direction of the transverse ligament were automatically calculated from routine computed tomography data of 270 patients using a registration algorithm. The relationship between acetabular angles and ligament direction and their relationship with sex, age, and pelvic tilt were sought. These relationships were then modelled using multilinear regression. RESULTS: Including the direction of the transverse ligament in the sagittal and transverse planes as a regressor in the multilinear model explained the variation in acetabular anteversion (R2 = 0.76 for men, R2 = 0.63 for women; standard deviation in prediction: men, 3.92° and women, 4.00°). CONCLUSIONS: The results indicate that the ligament was suitable as a guidance structure almost insensitive to the ligament in the sagittal and transverse planes must be considered. Estimation based on the direction in only 1 plane was not sufficiently accurate. The operative acetabular inclination was not correlated with the direction of the ligament. The correlations were higher in men than in women.
- MeSH
- acetabulum * diagnostické zobrazování chirurgie MeSH
- anteverze kosti diagnostické zobrazování MeSH
- dospělí MeSH
- kloubní ligamenta * diagnostické zobrazování anatomie a histologie MeSH
- kyčelní kloub diagnostické zobrazování anatomie a histologie chirurgie MeSH
- lidé středního věku MeSH
- lidé MeSH
- náhrada kyčelního kloubu * metody MeSH
- počítačová rentgenová tomografie * MeSH
- retrospektivní studie MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- zobrazování trojrozměrné MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Thanks to technical progress and the availability of virtual data, sex estimation methods as part of a biological profile are undergoing an inevitable evolution. Further reductions in subjectivity, but potentially also in measurement errors, can be brought by approaches that automate the extraction of variables. Such automatization also significantly accelerates and facilitates the specialist's work. The aim of this study is (1) to apply a previously proposed algorithm (Kuchař et al. 2021) to automatically extract 10 variables used for the DSP2 sex estimation method, and (2) to test the robustness of the new automatic approach in a current heterogeneous population. For the first aim, we used a sample of 240 3D scans of pelvic bones from the same individuals, which were measured manually for the DSP database. For the second aim a sample of 108 pelvic bones from the New Mexico Decedent Image Database was used. The results showed high agreement between automatic and manual measurements with rTEM below 5% for all dimensions except two. The accuracy of final sex estimates based on all 10 variables was excellent (error rate 0.3%). However, we observed a higher number of undetermined individuals in the Portuguese sample (25% of males) and the New Mexican sample (36.5% of females). In conclusion, the procedure for automatic dimension extraction was successfully applied both to a different type of data and to a heterogeneous population.
- MeSH
- algoritmy * MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- pánevní kosti * diagnostické zobrazování MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- soudní antropologie * metody MeSH
- určení pohlaví podle kostry * metody MeSH
- zobrazování trojrozměrné * MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Portugalsko MeSH
V současné době se zvyšuje množství studií zkoumajících vliv jak podkožního, tak viscerálního tuku na kvalitu lidského života. Kromě již prokázaného vztahu ke kardiovaskulárním onemocněním je otevřena i otázka vzájemné souvislosti obsahu a kvality tukové tkáně na kost. Na souboru rutinních CT-vyšetření 55 pacientů Fakultní nemocnice Hradec Králové byl zkoumán minerální obsah pánevní kosti, atenuační koeficienty a volumetrické hodnoty podkožního a viscerálního tuku. Výsledky ukázaly kladnou souvislost mezi tukovými depozity a minerálním obsahem, zároveň naznačily zásadní vliv celkové velikosti kosti.
Nowadays, an increasing number of studies examine the effect of both subcutaneous and visceral fat on the quality of human life. In addition to the already proven relationship to cardiovascular disease, the question of the interrelationship between the content and quality of fatty tissue on the bone is also open. The mineral content of the pelvic bone, attenuation coefficients and volumetric values of subcutaneous and visceral fat were examined on a set of routine CT examinations of 55 patients at the University Hospital Hradec Králové. The results showed a positive relationship between fat deposits and mineral content, as well as a significant effect of overall bone size.
Diffeomorphic shape registration allows for the seamless geometric alignment of shapes. In this study, we demonstrated the use of a registration algorithm to automatically seed anthropological landmarks on the CT images of the pelvis. We found a high correlation between manually and automatically seeded landmarks. The registration algorithm makes it possible to achieve a high degree of automation with the potential to reduce operator errors in the seeding of anthropological landmarks. The results of this study represent a promising step forward in effectively defining the anthropological measures of the human skeleton.
- MeSH
- algoritmy * MeSH
- anatomická značka * MeSH
- lidé středního věku MeSH
- lidé MeSH
- pánevní kosti anatomie a histologie diagnostické zobrazování MeSH
- počítačová rentgenová tomografie * MeSH
- počítačové zpracování obrazu * MeSH
- senioři MeSH
- soudní antropologie metody MeSH
- určení pohlaví podle kostry metody MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH