A three-dimensional model of the mouse at embryonic day 9

This paper describes a digital, three-dimensional model of the mouse embryo at E9. The model was made by reconstruction from images of serial histolog ical sections digitally warped to remove distortions and has a resolution o f approximately 9 mu m. The model can be digitally resectioned in any plane to provide images which resemble conventional histological sections. The m ain tissues have been identified and delineated by digital painting so that the anatomical components can be visualized and manipulated in 3-D surface - and volume-rendered views. This provides a three-dimensional definition o f anatomy that will provide a useful tool for interpreting and understandin g spatial data in mouse embryos. The anatomy of the model is discussed wher e it provides landmarks for interpretation and navigation or where it is un expected in light of existing descriptions of the E9 mouse embryo. The comp lete anatomy is not presented in this paper but will be available on CD-ROM . A detailed description of the technical aspects of the construction of th e model is included in an appendix. The model is the first of a series that will form the basis for an atlas/database of mouse development. This recon struction and its associated anatomy are available in a variety of data for mats with some supporting software from http://genex.hgu.mrc.ac.uk/. (C) 19 99 Academic Press.