Fluoroscopic bone fragment tracking for surgical navigation in femur fracture reduction by incorporating optical tracking of hip joint rotation center.
A new method for fluoroscopic tracking of a proximal bone fragment in femoral fracture reduction is presented. The proposed method combines 2-D and 3-D image registration from single-view fluoroscopy with tracking of the head center position of the proximal femoral fragment to improve the accuracy of fluoroscopic registration without the need for repeated manual adjustment of the C-arm as required in stereo-view registrations. Kinematic knowledge of the hip joint, which has a positional correspondence with the femoral head center and the pelvis acetabular center, allows the position of the femoral fragment to be determined from pelvis tracking. The stability of the proposed method with respect to fluoroscopic image noise and the desired continuity of the fracture reduction operation is demonstrated, and the accuracy of tracking is shown to be superior to that achievable by single-view image registration, particularly in depth translation.
Nakajima
Yoshikazu
Y
School of Engineering, The University of Tokyo, Tokyo 113-8657, Japan. nakajima@iml.u-tokyo.ac.jp
Tashiro
Takahito
T
Sugano
Nobuhiko
N
Yonenobu
Kazuo
K
Koyama
Tsuyoshi
T
Maeda
Yuki
Y
Tamura
Yuichi
Y
Saito
Masanobu
M
Tamura
Shin'ichi
S
Mitsuishi
Mamoru
M
Sugita
Naohiko
N
Sakuma
Ichiro
I
Ochi
Takahiro
T
Matsumoto
Yoichiro
Y
D005264:Femoral Fractures / Q000503:physiopathology* / Q000601:surgery*; D005269:Femur / Q000000981:diagnostic imaging* / Q000601:surgery*; D005471:Fluoroscopy / Q000379:methods*; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D055095:Optics and Photonics; D015641:Radiography, Interventional / Q000379:methods; D012399:Rotation; D025321:Surgery, Computer-Assisted / Q000379:methods*