J
John Ashburner
Researcher at University College London
Publications - 253
Citations - 68923
John Ashburner is an academic researcher from University College London. The author has contributed to research in topics: Voxel-based morphometry & Image registration. The author has an hindex of 89, co-authored 246 publications receiving 62755 citations. Previous affiliations of John Ashburner include Université libre de Bruxelles & Queen's University.
Papers
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Journal ArticleDOI
Voxel-Based Morphometry—The Methods
John Ashburner,Karl J. Friston +1 more
TL;DR: In this paper, the authors describe the steps involved in VBM, with particular emphasis on segmenting gray matter from MR images with non-uniformity artifact and provide evaluations of the assumptions that underpin the method, including the accuracy of the segmentation and the assumptions made about the statistical distribution of the data.
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A fast diffeomorphic image registration algorithm
TL;DR: DARTEL has been applied to intersubject registration of 471 whole brain images, and the resulting deformations were evaluated in terms of how well they encode the shape information necessary to separate male and female subjects and to predict the ages of the subjects.
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A voxel-based morphometric study of ageing in 465 normal adult human brains.
Catriona D. Good,Ingrid S. Johnsrude,John Ashburner,Richard N. Henson,Richard N. Henson,Karl J. Friston,Richard S. J. Frackowiak +6 more
TL;DR: Global grey matter volume decreased linearly with age, with a significantly steeper decline in males, and local areas of accelerated loss were observed bilaterally in the insula, superior parietal gyri, central sulci, and cingulate sulci.
Journal ArticleDOI
Spatial registration and normalization of images
Karl J. Friston,John Ashburner,Chris D. Frith,Jean-Baptiste Poline,Jon D. Heather,Richard S. J. Frackowiak +5 more
TL;DR: A general technique that facilitates nonlinear spatial (stereotactic) normalization and image realignment is presented that minimizes the sum of squares between two images following non linear spatial deformations and transformations of the voxel (intensity) values.
Journal ArticleDOI
Navigation-related structural change in the hippocampi of taxi drivers
Eleanor A. Maguire,David G. Gadian,Ingrid S. Johnsrude,Catriona D. Good,John Ashburner,Richard S. J. Frackowiak,Chris D. Frith +6 more
TL;DR: Structural MRIs of the brains of humans with extensive navigation experience, licensed London taxi drivers, were analyzed and compared with those of control subjects who did not drive taxis, finding a capacity for local plastic change in the structure of the healthy adult human brain in response to environmental demands.