title: Determination of the position and orientation of artificial knee implants using markers embedded in a bone: preliminary in vitro experiments.
abstract: This study describes the method of determination of the position and orientation of artificial knee implants using a single-plane radiograph. To simplify the 3D/2D matching problem, we proposed to use small markers embedded in a bone. From the image coordinates of markers, it is possible to estimate the position and orientation of implants if the relationship between the markers and the implant is known. The results of the in vitro experiment showed that rms errors in in-plane/out-of-plane translations and rotations were 0.2/2.3 mm and 0.2/0.2 degrees, respectively.
authors.affiliation: Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Imai
authors.forename: K
authors.initials: K
authors.lastname: Higashijima
authors.forename: A
authors.initials: A
authors.lastname: Ishida
authors.forename: Y
authors.initials: Y
authors.lastname: Fukuoka
authors.forename: A
authors.initials: A
authors.lastname: Hoshino
authors.forename: H
authors.initials: H
authors.lastname: Minamitani
mesh_terms: D000465:Algorithms; D019544:Equipment Failure Analysis / Q000379:methods*; D005240:Feasibility Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods*; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D007720:Knee Prosthesis; D009038:Motion; D009068:Movement; D019047:Phantoms, Imaging; D011187:Posture; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D012399:Rotation; D012680:Sensitivity and Specificity