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Neuroimage. 2012 Feb 1;59(3):2255-65. doi: 10.1016/j.neuroimage.2011.09.062. Epub 2011 Oct 1.

Construction of a consistent high-definition spatio-temporal atlas of the developing brain using adaptive kernel regression.

Author information

1
Biomedical Image Analysis (BioMedIA) Group, Department of Computing, Imperial College London, and Centre for the Developing Brain, Hammersmith Hospital, London, UK. a.serag09@imperial.ac.uk

Erratum in

  • Neuroimage. 2012 Nov 1;63(2):998.

Abstract

Medical imaging has shown that, during early development, the brain undergoes more changes in size, shape and appearance than at any other time in life. A better understanding of brain development requires a spatio-temporal atlas that characterizes the dynamic changes during this period. In this paper we present an approach for constructing a 4D atlas of the developing brain, between 28 and 44 weeks post-menstrual age at time of scan, using T1 and T2 weighted MR images from 204 premature neonates. The method used for the creation of the average 4D atlas utilizes non-rigid registration between all pairs of images to eliminate bias in the atlas toward any of the original images. In addition, kernel regression is used to produce age-dependent anatomical templates. A novelty in our approach is the use of a time-varying kernel width, to overcome the variations in the distribution of subjects at different ages. This leads to an atlas that retains a consistent level of detail at every time-point. Comparisons between the resulting atlas and atlases constructed using affine and non-rigid registration are presented. The resulting 4D atlas has greater anatomic definition than currently available 4D atlases created using various affine and non-rigid registration approaches, an important factor in improving registrations between the atlas and individual subjects. Also, the resulting 4D atlas can serve as a good representative of the population of interest as it reflects both global and local changes. The atlas is publicly available at www.brain-development.org.

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