CT assessment of asymptomatic hip joints for the background of femoroacetabular impingement morphology
CT assessment of asymptomatic hip joints for the background of femoroacetabular impingement morphology
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DOI：
10.5152/dir.2013.13374
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发表时间：
2014-05-01
影响因子：
2.1
通讯作者：
Aydingoz, Ustun
中科院分区：
文献类型：
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作者：
Ergen, Fatma Bilge;Vudali, Sureyya;Aydingoz, Ustun
目的：本研究的目的是评估存在的凸轮和钳形态在无症状的个人与阴性femoroacetabular撞击测试，并确定和比较的范围α角使用两种measurementmethods.MATERIALS和方法在总数，68例连续患者接受腹部骨盆计算机断层扫描（CT）的原因以外的髋关节问题的患者人群。排除了股骨髋臼撞击试验阳性的患者。从股骨头-颈交界处的前部到上级部分的轴向倾斜（A（N））和基于径向重组的图像（A（R））测量α角，以及股骨头-颈偏移、中心-边缘角、髋臼扭转角测量和髋臼交叉征评估。（α角增加，股骨头-颈偏心距减小）和钳形形态（中心-边缘角增加，髋臼扭转减小）分别为20.0%、26.8%、25.8%和10.2%。平均A（R）范围为41.64度+/- 4.23度至48.13度+/- 4.63度，而A（N）为41.10度+/- 4.44度。A（R）值高于A（N）值，差异有统计学意义（P < 0.001）。最高的A（R）值测量的图像从股骨头颈junctions.CONCLUSION前上部分，在无症状的受试者，更高的α角值从径向重建图像，特别是从股骨头颈junctions. Conclusion前上部分的轴向倾斜CT图像相比。用于评估凸轮和钳子形态的其他测量值也可能超出一般人群中认为正常的范围。
PURPOSE The purposes of this study were to assess the presence of cam and pincer morphology in asymptomatic individuals with a negative femoroacetabular impingement test, and to determine and compare the ranges of alpha angle using two measurement methods.MATERIALS AND METHODS In total, 68 consecutive patients who underwent abdominopelvic computed tomography (CT) for reasons other than hip problems were the patient population. Patients who had a positive femoroacetabular impingement test were excluded. Alpha angle measurements from axial oblique (A(N)) and radial reformat-based images (A(R)) from the anterior through the superior portion of the femoral head-neck junction, as well as femoral head-neck offset, center-edge angle, acetabular version angle measurements, and acetabular crossover sign assessment, were made.RESULTS Overall prevalences of cam (increased alpha angle, decreased femoral head-neck offset) and pincer morphology (increased center-edge angle, decreased acetabular version) were 20.0%, 26.8%, 25.8%, and 10.2% of the hips, respectively. The mean A(R) ranged from 41.64 degrees +/- 4.23 degrees to 48.13 degrees +/- 4.63 degrees, whereas A(N) was 41.10 degrees +/- 4.44 degrees. The values of A(R) were higher than A(N), and the difference was statistically significant (P < 0.001). The highest A(R) values were measured on images from the anterosuperior section of femoral head-neck junction.CONCLUSION In asymptomatic subjects, higher alpha angle values were obtained from radial reformatted images, specifically from the anterosuperior portion of the femoral head-neck junction compared with the axial oblique CT images. Other measurements used for the assessment of cam and pincer morphology can also be beyond the ranges that are considered normal in the general population.