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Comparison of acetabular and femoral morphologies on hip, pelvic, and lumbar radiographs

  • Seong Jong Yun
    Affiliations
    Department of Radiology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, 892 Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea
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  • Yun Kyung Shin
    Affiliations
    Department of Radiology, Kyung Hee University Hospital, School of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
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  • Ji Seon Park
    Affiliations
    Department of Radiology, Kyung Hee University Hospital, School of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
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  • Wook Jin
    Correspondence
    Corresponding author.
    Affiliations
    Department of Radiology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, 892 Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea
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  • Yong Sung Park
    Affiliations
    Department of Radiology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, 892 Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea
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  • So Young Park
    Affiliations
    Department of Radiology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, 892 Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea
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  • Kyung Nam Ryu
    Affiliations
    Department of Radiology, Kyung Hee University Hospital, School of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
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      Highlights

      • Compared with pelvic radiograph, CEAs in L-spine were not significantly different.
      • Compared with pelvic radiograph, AAs and FHEIs in L-spine were different.
      • All parameters between pelvic and hip radiographs were not significantly different.
      • Measurements of cross over signs and pistol grip deformity were interchangeable.
      • The reliability of parameters was excellent or good among three radiographs.

      Abstract

      Purpose

      To evaluate the reliability of the parameters for acetabular/femoral pathomorphologies in L-spine and hip radiographs compared to pelvic radiographs.

      Methods

      A retrospective review of L-spine, hip, and pelvic radiographs from 101 patients was performed. Three radiologists independently measured five parameters (acetabular roof angle of Tönnis [Tönnis angle], center-edge-angle of Wiberg [CEA], femoral head extrusion index [FHEI], cross-over sign, pistol-grip deformity) in each radiograph.

      Results

      No significant differences were identified (p ≥ 0.07) except Tönnis angles and FHEIs from the L-spine radiographs. Inter-radiograph/inter-reader ICCs were excellent or good.

      Conclusion

      Pathomorphology-related measurements in L-spine radiographs can also be used as alternatives to those in pelvic or hip radiographs. If L-spine radiographs are already available, additional pelvic or hip radiographs may be unnecessary, thus reducing patients' overall radiation exposure.

      Keywords

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