JACIII Vol.22 No.3 pp. 333-340
doi: 10.20965/jaciii.2018.p0333


Automated Femoral Stem Canal Fill Ratio Evaluation for Bipolar Hip Arthroplasty in 2D X-Ray Image

Yosuke Uozumi*, Kouki Nagamune**, and Keisuke Oe***

*Research Division on Advanced Information Technology, Cyberscience Center, Tohoku University
6-6-05 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan

**Department of Human and Artificial Intelligence Systems, Graduate School of Engineering, University of Fukui
3-9-1 Bunkyo, Fukui, Fukui 910-8507, Japan

***Department of Orthopaedic Surgery, Graduate School of Medicine, Kobe University
7-5-1 Kusunoki-Cho, Chuo-Ku, Kobe, Hyogo 650-0017, Japan

April 15, 2017
March 1, 2018
May 20, 2018
X-ray image, stem canal fill ratio, bipolar hip arthroplasty
Femur canal fill ratio calculated by regions of canal and stem.

Femur canal fill ratio calculated by regions of canal and stem.

A stem loosening is one of the significant problem in the bipolar hip arthroplasty (BHA), causes a pain and instability of a patient’s hip, and requires a further surgery of BHA. A stem canal fill ratio (SCFR), a general evaluation of the stem loosening, have been clinically studied many; however, a determination of the optimal SCFR evaluation has not been still understood well. A purpose of this study is to propose an automatic and quantitative evaluation of SCFR from BHA hip X-ray image. A proposed method segmented the femoral canal and stem, and evaluated SCFR. In experiments, a proposed method’s accuracy was validated, and six BHA patients’ SCFRs were clinically evaluated (age 88±7 (74–93), one male / five females). In result of the proposed method’s accuracy, the femur canal was 90.60±3.65%, and the stem was 97.83±0.46%; therefore, the proposed method had the accuracy to well evaluate SCFR. Result of six BHA patients’ SCFRs was 63.70±5.62%. In conclusion, the proposed method was able to automatically evaluate SCFR from the hip X-ray image with BHA.

Cite this article as:
Y. Uozumi, K. Nagamune, and K. Oe, “Automated Femoral Stem Canal Fill Ratio Evaluation for Bipolar Hip Arthroplasty in 2D X-Ray Image,” J. Adv. Comput. Intell. Intell. Inform., Vol.22 No.3, pp. 333-340, 2018.
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Last updated on May. 24, 2023