Postmenopozal kadınlarda dijital x-ışını radyogrammetri bulguları ile kemik mineral yoğunluğu ilişkisi
Bu çalışmada, dijital radyografilerde elde edilen radyogrammetrik ölçümler ile dual enerji X- ışını absorbsiyometri (DEXA) kullanarak saptanan kemik mineral yoğunluğu (KMY) arasındaki ilişki araştırıldı. Çalışmaya 57 postmenopozal kadın alındı. Nondominant el ikinci metakarpal kemiğin" dijital ortamdaki radyografik görüntülerinde, kemiğin uzun aksının tam orta noktasında dış çap (DÇ) ve iç çap (İÇ) ölçümleri yapıldı. Bu iki değer kullanılarak basit geometrik işlemlerle kombine kortikal kalınlık (KKK), kortikal alan (KA), medüller alan (MA), metakarpal indeks (Mİ) ve kortikal oran (KO) değerleri hesaplandı. DEXA ölçümleri sonucu 28 olgu osteoporoz grubunu, saptanmayan 29 olgu kontrol grubunu oluşturdu. İÇ ve MA osteoporozlu olgularda anlamlı olarak yüksek (p
Correlation between digital x-ray radiogrammetry findings and bone mineral density in postmenopausal women
The relation between bone mineral density (BMD) determined by dual energy X ray absorptiometry (DEXA) and radiogrammetric measurements on digital radiographies was investigated in this study. Fifty-seven postmenopausal women who had applied for DEXA measurement were included in the study. External diameter (ED) and internal diameter (ID) measurements were performed on the midpoints of the longitudinal axis of the nondominant second metacarpal bone on digital radiographic images. By using these two measurement values, the combined cortical thickness (COT), cortical area (CA), medullary area (MA), metacarpal index (Ml) and cortical ratio (CR) values were determined by simple geometrical calculations. The osteoporosis group had 28 women and the control group 29 women after DEXA evaluations. ID and MA were found to be significantly higher (p<0.001); and CCT, CR and Ml significantly lower (p<0.001) in women with osteoporosis. BMD of lumbar spine (vertebrae L2-L4) positively correlated with CCT (p<0.05). Positive correlations were found between BMD of femur neck and CCT (p<0.001), Ml, CR (p<0.05). BMD of femur Ward's triangle correlated with CCT, Ml and CR positively while it correlated negatively with ID and MA (p<0.001). Similarly BMD of femur trochanter showed positive correlations with CCR, CA, Ml, CR (p<0.001), and negative correlations with ID and MA (p<0.05). No significant thres-hold value could be provided in the ROC curves in order to discriminate patients with osteoporosis from normal. The concordant relations found between bone geometry measurements and DEXA seemed to be encouraging to prove probably the value of digital radiogrammetry for the discrimination of osteoporotic patients from normal, in studies with larger patient population
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