Observational Study of Femoral HU at Different Measurement Levels in Patients with ONFH on CT Imaging
Objective Preliminary investigation of the appropriate level of HU for assessing proximal femoral bone quality in ONFH by analysing the differences in femoral HU and correlation with bone density at four different measurement levels on CT imaging.Methods We retrospectively analysed the CT images of 115 patients(188 hips)who attended the ONFH Centre of Necrosis of the Femoral Head of the Third Affiliated Hospital of Guangzhou University of Chinese Medicine from 2020 to 2022,measured the HU of the femoral head at four observation levels in ONIS 2.5 PACS software,compared their differences and evaluated the correlation with bone mineral density.Results 1.There was a statistical difference between the HUs at different measurement planes of the femoral head in conventional CT(P＜0.05),and no statistical difference between the HUs at different measurement planes of the femoral head in ARCO Ⅱ(P＞0.05);there was a statistical difference between the HUs at different measurement planes of the femoral head in ARCO Stage Ⅲ(P＜0.05).2.HU and BMD were significantly and positively correlated at all measured levels of the femoral head,with the best correlation at the mid-head plane(rs=0.536),the strongest correlation between HU and BMD at the full-head plane in ARCO Ⅱ(rs=0.614),and the strongest correlation between HU and BMD at the mid-head plane in ARCO Ⅱ(rs=0.500).Conclusion T The selection of a conventional CT measurement plane affects the assessment of femoral HU for bone quality in the ONFH head.The median plane may be the optimal choice for initial assessments of stability and bone quality in the femoral head.For straightforward assessments of bone quality in the head at different stages,the median plane is suitable for ARCO Ⅱ,while the anterior median plane is more appropriate for ARCO Ⅲ patients.
Femoral Head NecrosisDual-energy X-ray AbsorptiometryHunsfield UnitBone DensityOsteoporosis
万方数据
维普
