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Longitudinal diffusion tensor imaging in a rat brain glioma model
Author(s) -
LopePiedrafita Silvia,
GarciaMartin Maria L.,
Galons JeanPhilippe,
Gillies Robert J.,
Trouard Theodore P.
Publication year - 2008
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.1256
Subject(s) - diffusion mri , fractional anisotropy , white matter , glioma , anisotropy , brain tumor , nuclear magnetic resonance , diffusion , diffusion imaging , chemistry , pathology , magnetic resonance imaging , medicine , cancer research , physics , optics , radiology , thermodynamics
In order to investigate the properties of water motion within and around brain tumors as a function of tumor growth, longitudinal diffusion tensor imaging (DTI) was carried out in a rat brain glioma (C6) model. As tumors grew in size, significant anisotropy of water diffusion was seen both within and around the tumor. The tissue water surrounding the tumor exhibited high planar anisotropy, as opposed to the linear anisotropy normally seen in white matter, indicating that cells were experiencing stress in a direction normal to the tumor border. When tumors were sufficiently large, significant anisotropy was also seen within the tumor because of longer‐range organization of cancer cells within the tumor borders. These findings have important implications for diffusion‐weighted MRI experiments examining tumor growth and response to therapy. Copyright © 2008 John Wiley & Sons, Ltd.