SDM   Seed-based d Mapping
formerly "Signed Differential Mapping"
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SDM exploration of the results

Creation of a mask

Masks are used in SDM to posteriorly extract the values in a coordinate or region from all studies and analyses. Masks are saved in separate mask_*.nii.gz files in the corresponding model folder (e.g., analysis_model_name). These files can be used in more than one meta-analysis.

To create a mask

Press the button [Create mask]


Select [Create a mask] in the Tools menu, to open the following dialog:

Mask dialog

Command-line and batch usage

mask model_name,type,numbers


m25_0_m20 = mask MyMean,coordinate,-25,0,-20

left_amygdala = mask MyMean,label,41


(white matter atlas 1): Thiebaut de Schotten M, Dell'Acqua F, Forkel SJ, Simmons A, Vergani F, Murphy DG and Catani M. A lateralized brain network for visuospatial attention. Nat Neurosci 2011; 14:1245-1246. link .

(white matter atlas 2): Thiebaut de Schotten M, Ffytche DH, Bizzi A, Dell'Acqua F, Allin M, Walshe M, Murray R, Williams SC, Murphy DG and Catani M. Atlasing location, asymmetry and inter-subject variability of white matter tracts in the human brain with MR diffusion tractography. Neuroimage 2011; 54:49-59. link .

(white matter atlas 3): Rojkova K, Volle E, Urbanski M, Humbert F, Dell'Acqua F and Thiebaut de Schotten M. Atlasing the frontal lobe connections and their variability due to age and education: a spherical deconvolution tractography study. Brain Struct Funct 2015; in Press. link .