Abstract
Purpose
This study investigates methodologies for the estimation of small animal anatomy from non-tomographic modalities, such as planar X-ray projections, optical cameras, and surface scanners. The key goal is to register a digital mouse atlas to a combination of non-tomographic modalities, in order to provide organ-level anatomical references of small animals in 3D.
Procedures
A 2D/3D registration method was developed to register the 3D atlas to the combination of non-tomographic imaging modalities. Eleven combinations of three non-tomographic imaging modalities were simulated, and the registration accuracy of each combination was evaluated.
Results
Comparing the 11 combinations, the top-view X-ray projection combined with the side-view optical camera yielded the best overall registration accuracy of all organs. The use of a surface scanner improved the registration accuracy of skin, spleen, and kidneys.
Conclusions
The methodologies and evaluation presented in this study should provide helpful information for designing preclinical atlas-based anatomical data acquisition systems.
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Acknowledgments
The authors thank Dr. Stefan Klein and Dr. Marius Staring for providing the elastix registration toolbox and giving advises for using it and Dr. Yuri Boykov for offering publicly available codes of the graph cuts method which was used for mouse atlas and subject phantom construction. We also acknowledge Dr. Ritva Lofstedt for comments on this paper and Richard Taschereau, Waldemar Ladno, Nam Vu, David Prout, Zheng Gu Alex Dooraghi, and Brittany Berry Puzey for helpful discussions on this project. This work was supported in part by SAIRP NIH-NCI 2U24 CA092865 and in part by a UCLA Chancellor’s Bioscience Core grant.
Conflict of Interest Statement
A provisional patent application describing this work has been filed (UCLA Case No. 2011–395).
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Wang, H., Stout, D.B. & Chatziioannou, A.F. Mouse Atlas Registration with Non-tomographic Imaging Modalities—a Pilot Study Based on Simulation. Mol Imaging Biol 14, 408–419 (2012). https://doi.org/10.1007/s11307-011-0519-x
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DOI: https://doi.org/10.1007/s11307-011-0519-x