title: Construction of an MRI 3D high resolution sheep brain template.
abstract: Sheep is a developing animal model used in the field of neurosciences for the study of many behavioral, physiological or pathophysiological mechanisms, including for example, the central control of social behavior, brain injury or neurodegenerative diseases. However, sheep remains an orphan species in the field of magnetic resonance imaging (MRI). Therefore, a mean image (template), resulting of registrations of multiple subject images is needed and currently does not exist. In this study, we: i) computed multimodal high resolution 3D in-vivo sheep brain templates of T1 weighted (T1W) and T2W images, ii) computed gray matter (GM), white matter (WM) and cerebrospinal fluid (CSF) prior probability maps using linear and optimized non-linear registrations iii) used prior probability maps to perform the segmentation of a single brain tissues. Computed multimodal sheep brain templates showed to preserve and underline all brain patterns of a single T1W or T2W image, and prior probability maps allowed to improve the segmentation of brain tissues. Finally, we demonstrated that these templates and prior probability maps were able to be portable in other publicly available imaging software and could be used as standardized spaces for multi-institution neuroimaging studies or other neuroscience methods.
authors.affiliation: INRA, UMR 85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France; CNRS, UMR 7247, F-37380 Nouzilly, France; Université François Rabelais, F-37041 Tours, France.
authors.forename: Arsène
authors.initials: A
authors.lastname: Ella
authors.affiliation: INRA, UMR 85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France; CNRS, UMR 7247, F-37380 Nouzilly, France; Université François Rabelais, F-37041 Tours, France. Electronic address: mkeller@tours.inra.fr.
authors.forename: Matthieu
authors.initials: M
authors.lastname: Keller
mesh_terms: D000818:Animals; D001921:Brain / Q000033:anatomy & histology*; D001931:Brain Mapping / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012756:Sheep
keywords: Image registration; In-vivo sheep brain; MRI; Prior probability map; Segmentation; Template