Bilgisayarlı Tomografi Görüntüleri Üzerinden Hesaplanan Os Sacrum ve Os Coccygis Eğriliklerinin Cinsiyete Göre Değerlendirilmesi

Year 2023, Volume: 6 Issue: 1, 10 - 16, 28.02.2023

Merve Nur Özgen , Zülal Öner , Mert Nahir , Serkan Öner

https://doi.org/10.53446/actamednicomedia.1125812

Abstract

Amaç: İnsanlarda cinsiyetin belirlenmesinde iskelet yapısı anahtar bir rol oynar. Pelvis iskeletini oluşturan os sacrum ve os coccygis, cinsiyete bağlı fonksiyonel farklılıklar nedeniyle cinsiyet tayini için önemli kemiklerdir. Bu çalışmada; ortogonal düzleme getirilmiş Bilgisayarlı Tomografi (BT) görüntüleri üzerinden hesaplanan os sacrum ve os coccygis eğriliklerinin cinsiyete göre farklılıklarını belirlemeyi amaçladık.
Materyal ve Metot: Çalışmada 25-50 yaş arası sağlıklı 150 bireye ait (75 Kadın, 75 Erkek) BT görüntüleri kullanıldı. Horos yazılımı ile BT görüntüleri ölçüm için uygun formatta düzenlendi. Sagittal görüntü üzerinde; os sacrum ve os coccygis üzerinden lumbosakral açı (LSA), sakral eğrilik (SE), sakral kifoz (SK), sakrokoksigeal açı (SKA), sakrokoksigeal eklem açısı (SKEA) ve koksigeal eğrilik (KE) olmak üzere 6 farklı ölçüm yapıldı.
Bulgular: Ölçüm sonuçlarına göre; LSA ve SKA değerleri, erkeklerde kadınlara göre yüksek, SKEA değeri de kadınlarda erkeklere göre yüksek olduğu tespit edildi (p≤0.05). QDA’ya göre tüm parametrelerden erkek bireyleri ayırt etme gücü %93.3, kadın bireyleri ayırt etme gücü %85.3 ve toplam ayırt etme gücü %89.3 bulundu.
Sonuç: Bu sonuçlara göre erkeklerde lumbosakral ve sakrokoksigeal eklemlerin kadınlara göre daha düz göründüğü sonucuna varıldı. SC, SK ve CC parametreleri cinsel dimorfizm göstermedi. Kullandığımız tüm parametreler dikkate alındığında yüksek oranda cinsiyet ayrımcılığı elde ettik.

Keywords

Bilgisayarlı Tomografi, Cinsiyet Tahmini, Discriminant Analizi, Os Coccygis, Os Sacrum

Evaluation of the Sacral and Coccygeal Curvatures Calculated via Computed Tomography Images Based on Gender

Abstract

Objective: The skeletal structure has a significant role in the estimation of human gender. The os sacrum and os coccyx bones that constitute the pelvic skeleton are important in sex estimation due to their functional differences based on sex. In the present study, we aimed to determine the differences in os sacral and os coccygeal curvatures calculated with orthogonal plane computed tomography images based on gender.
Methods: Computed tomography images of 150 healthy individuals (75 females, 75 males) between the ages of 25-50 were used in the study. The computed tomography images were edited into a suitable format by the Horos software for measurement. Six sacral and coccygeal measurements, lumbosacral angle (LSA), sacral curvature (SC), sacral kyphosis (SK), sacrococcygeal angle (SCA), sacrococcygeal joint angle (SCJA), and coccygeal curvature (CC) were conducted on the sagittal image.
Results: The measurement results indicated that LSA and SCA values were higher in male subjects when compared to females, and SCJA values were higher in females when compared to males (p≤0.05). Quadratic Discriminant Analysis (QDA) results indicated that these parameters were 93.3% effective in estimating male gender, 85.3% effective in estimating female gender, with an overall estimation rate of 89.3%.
Conclusion: According to these results, it was concluded that the lumbosacral and sacrococcygeal joints appear flatter in men than in women. SC, SK and CC parameters did not show sexual dimorphism. Considering all the parameters we used, we achieved a high rate of gender discrimination.

Keywords

Computed Tomography, Gender Prediction, Discriminant Analysis, Coccyx, Sacrum

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