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

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.

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

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

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. 28, 2024