Evaluation of three-dimensional image registration methodologies for in vivo micro-computed tomography.

Full Abstract

The advent of in vivo micro-computed tomography (micro-CT) provides a novel approach to measure the temporal adaptation of bone micro-architecture within an individual. Spatial alignment in the scanner between serial scans is challenging, but three-dimensional image registration can be used to superimpose the resulting image data, thus ensuring consistent regions of interest (ROI) for analysis. There have been several approaches to image registration developed, yet little is known about their application to high resolution micro-CT data. The purpose of this study was to explore combinations of three image registration similarity measures and three image interpolators, in addition to multi-resolution registration configurations, for assessment of computational efficiency and accuracy on both in vitro and in vivo micro-CT data. Accuracy measures were assessed by comparison with a gold-standard reference transform based on attached fiducial markers. It was concluded that a mutual information registration similarity measure with a linear image interpolator, applied at steps of increasing image resolution, provided the best compromise between accurate and efficient results. In vivo registration of tibial bone microstructure measured in an ovariectomized rat model provided consistent ROI thus demonstrating the usefulness of three-dimensional image registration for in vivo experimental and clinical micro-CT research. It is a technique that is poised to become commonly utilized for analysis of micro-CT data to diagnose and monitor efficacy of therapy in bone diseases.

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Author information

Author/s: Boyd, Steven K (SK); Moser, Stephan (S); Kuhn, Michael (M); Klinck, Robert J (RJ); Krauze, Peter L (PL); Müller, Ralph (R); Gasser, Jürg A (JA);

Affiliation: Department of Mechanical and Manufacturing Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive, N.W., Calgary, Alberta, T2N 1N4, Canada. skboyd(-atsign-)ucalgary.ca

Journal and publication information

Publication Type: Comparative Study; Evaluation Studies; In Vitro; Journal Article

Journal: Annals of biomedical engineering (Ann Biomed Eng), published in United States. (Language: eng)

Reference: 2006-Oct; vol 34 (issue 10) : pp 1587-99

Dates: Created 2006/10/25; Completed 2006/12/05;

PMID: 16957987, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Animals
Biomedical Engineering
Bone and Bones - radiography
Disease Models, Animal
Female
Osteoporosis - radiography

Osteoporosis - radiography
Ovariectomy
Radiographic Image Interpretation, Computer-Assisted - methods
Rats
Software
Tomography, X-Ray Computed - methods; statistics & numerical data

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