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

Thresholding the results

Results from previous calculations can be thresholded to a given probability or a given SDM-Z / SDM-Q value, obtaining peak coordinates, clusters breakdowns and NIfTI images. This will also open MRIcron or FSLView brain viewer to display the results (see Settings section for help on setting up MRIcron or FSLView integration).

Please find citation information for the atlas by Catani, Thiebaut de Schotten et al below.

To threshold a map

Press the button [Threshold]


Select [Threshold] in the Statistics menu, to open the following dialog:

Dialog picture

Command-line and batch usage

threshold map, p | (other), value, minimum peak height, minimum number of voxels


threshold MyMean_z, p, 0.005, 1, 10


(effect-sizes and variances): Radua J, Mataix-Cols D, Phillips ML, El-Hage W, Kronhaus DM, Cardoner N and Surguladze S. A new meta-analytic method for neuroimaging studies that combines reported peak coordinates and statistical parametric maps. Eur Psychiatry 2012; 27:605–611. link .

(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 .