### Abstract

The carpal regions of ten cadaver extremities were imaged by CT. The images were combined into a 3-dimensional model of the carpus using a technique based on a dynamic programming algorithm to find an optimal estimate of the location of the bone boundaries in the CT images. The resulting set of surface points on each bone was used to compute volumes and principal and antipodal axes for the bones. A spatial coordinate system was established based on the positions of the centroids of three bones in the distal carpal row. The angular orientations of all carpal bones were determined with respect to this system. The principal axes for the same bone among ten wrist specimens proved to be more widely dispersed than the antipodal axes for the same bones. The antipodal axes also correspond more closely to an intuitive notion of the "longest axis" of the bones. We conclude that the antipodal axis is a more reliable and useful measure of bone orientation than the principal axis.

Original language | English |
---|---|

Pages (from-to) | 715-726 |

Number of pages | 12 |

Journal | Annals of Biomedical Engineering |

Volume | 21 |

Issue number | 6 |

DOIs | |

State | Published - 1 Nov 1993 |

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### Keywords

- 3-D reconstruction
- Image analysis
- Wrist

### Cite this

*Annals of Biomedical Engineering*,

*21*(6), 715-726. https://doi.org/10.1007/BF02368650

}

*Annals of Biomedical Engineering*, vol. 21, no. 6, pp. 715-726. https://doi.org/10.1007/BF02368650

**Location and geometric description of carpal bones in CT images.** / Tagare, H. D.; Elder, K. W.; Stoner, D. M.; Patterson, R. M.; Nicodemus, C. L.; Viegas, S. F.; Hillman, G. R.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Location and geometric description of carpal bones in CT images

AU - Tagare, H. D.

AU - Elder, K. W.

AU - Stoner, D. M.

AU - Patterson, R. M.

AU - Nicodemus, C. L.

AU - Viegas, S. F.

AU - Hillman, G. R.

PY - 1993/11/1

Y1 - 1993/11/1

N2 - The carpal regions of ten cadaver extremities were imaged by CT. The images were combined into a 3-dimensional model of the carpus using a technique based on a dynamic programming algorithm to find an optimal estimate of the location of the bone boundaries in the CT images. The resulting set of surface points on each bone was used to compute volumes and principal and antipodal axes for the bones. A spatial coordinate system was established based on the positions of the centroids of three bones in the distal carpal row. The angular orientations of all carpal bones were determined with respect to this system. The principal axes for the same bone among ten wrist specimens proved to be more widely dispersed than the antipodal axes for the same bones. The antipodal axes also correspond more closely to an intuitive notion of the "longest axis" of the bones. We conclude that the antipodal axis is a more reliable and useful measure of bone orientation than the principal axis.

AB - The carpal regions of ten cadaver extremities were imaged by CT. The images were combined into a 3-dimensional model of the carpus using a technique based on a dynamic programming algorithm to find an optimal estimate of the location of the bone boundaries in the CT images. The resulting set of surface points on each bone was used to compute volumes and principal and antipodal axes for the bones. A spatial coordinate system was established based on the positions of the centroids of three bones in the distal carpal row. The angular orientations of all carpal bones were determined with respect to this system. The principal axes for the same bone among ten wrist specimens proved to be more widely dispersed than the antipodal axes for the same bones. The antipodal axes also correspond more closely to an intuitive notion of the "longest axis" of the bones. We conclude that the antipodal axis is a more reliable and useful measure of bone orientation than the principal axis.

KW - 3-D reconstruction

KW - Image analysis

KW - Wrist

UR - http://www.scopus.com/inward/record.url?scp=0027692782&partnerID=8YFLogxK

U2 - 10.1007/BF02368650

DO - 10.1007/BF02368650

M3 - Article

C2 - 8116922

AN - SCOPUS:0027692782

VL - 21

SP - 715

EP - 726

JO - Annals of Biomedical Engineering

JF - Annals of Biomedical Engineering

SN - 0090-6964

IS - 6

ER -