3D-3D Registration of partial capitate bones using spin-images

Ryan Breighner, David R. Holmes, Shuai Leng, Kai Nan An, Cynthia McCollough, Kristin Zhao

研究成果: Conference contribution

摘要

It is often necessary to register partial objects in medical imaging. Due to limited field of view (FOV), the entirety of an object cannot always be imaged. This study presents a novel application of an existing registration algorithm to this problem. The spin-image algorithm [1] creates pose-invariant representations of global shape with respect to individual mesh vertices. These 'spin-images,' are then compared for two different poses of the same object to establish correspondences and subsequently determine relative orientation of the poses. In this study, the spin-image algorithm is applied to 4DCT-derived capitate bone surfaces to assess the relative accuracy of registration with various amounts of geometry excluded. The limited longitudinal coverage under the 4DCT technique (38.4mm, [2]), results in partial views of the capitate when imaging wrist motions. This study assesses the ability of the spin-image algorithm to register partial bone surfaces by artificially restricting the capitate geometry available for registration. Under IRB approval, standard static CT and 4DCT scans were obtained on a patient. The capitate was segmented from the static CT and one phase of 4DCT in which the whole bone was available. Spin-image registration was performed between the static and 4DCT. Distal portions of the 4DCT capitate (10-70%) were then progressively removed and registration was repeated. Registration accuracy was evaluated by angular errors and the percentage of sub-resolution fitting. It was determined that 60% of the distal capitate could be omitted without appreciable effect on registration accuracy using the spin-image algorithm (angular error < 1.5 degree, sub-resolution fitting > 98.4%).

原文English
主出版物標題Medical Imaging 2013
主出版物子標題Image-Guided Procedures, Robotic Interventions, and Modeling
DOIs
出版狀態Published - 2013
事件Medical Imaging 2013: Image-Guided Procedures, Robotic Interventions, and Modeling - Lake Buena Vista, FL, United States
持續時間: 2013 二月 122013 二月 14

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
8671
ISSN(列印)0277-786X

Conference

ConferenceMedical Imaging 2013: Image-Guided Procedures, Robotic Interventions, and Modeling
國家United States
城市Lake Buena Vista, FL
期間13-02-1213-02-14

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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