Automatic determination of an anatomical coordinate system for a three-dimensional model of the human patella

JOURNAL OF BIOMECHANICS

卷:46

Article

Rainbow, Michael J.¹  Miranda, Daniel L.²  Cheung, Roy T. H.¹  Schwartz, Joel B.^3,4  Crisco, Joseph J.^3,4  Davis, Irene S.¹  Fleming, Braden C.^3,4 

[1] Harvard Univ, Sch Med, Dept Phys Med & Rehabil, Spaulding Natl Running Ctr, Cambridge, MA 02138 USA

[2] Harvard Univ, Sch Med, Wyss Inst Biol Inspired Engn, Boston, MA USA

[3] Brown Univ, Warren Alpert Med Sch, Dept Orthopaed, Providence, RI 02912 USA

[4] Rhode Isl Hosp, Providence, RI USA

关键词: Patella;    Anatomical coordinate system;    Computed tomography;    In vivo;    Patellofemoral;   

DOI  :  10.1016/j.jbiomech.2013.05.024

来源: Elsevier

【 摘 要 】

Measuring the in vivo 3-D kinematics of the patella requires a repeatable anatomical coordinate system (ACS). The purpose of this study was to develop an algorithm to determine an ACS using the patella's unique morphology. An ACS was automatically constructed that aligned the proximal/distal (PD) axis with the posterior vertical ridge. Inter-subject ACS repeatability was determined by registering all patellae and their associated ACSs to a reference patella. The mean angle between the reference patella ACS and each subject's axes was less than 2.5 degrees and the 95% CI was 1.0 degrees-4.0 degrees. Here, we presented an anatomical coordinate system that is independent of the observer's subjective judgement or orientation of the knee within the scanner. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free