Clusters

Submitted by Ali on Sun, 08/21/2016 - 23:08

Dear Dr YAN

please i want to read about clusters,i need to know every thing about(cluter size ,peak in cluster and custer report)

and i have question if i save all cluter does the cluter report return all activated regions for all slices?

thanks for your help.

Forums:

YAN Chao-Gan

Wed, 08/24/2016 - 08:59

1. http://rfmri.org/course: The R-fMRI Course V1.0 Part II has some indications.

2. Yes.

Ali

Thu, 08/25/2016 - 23:10

Thanks for fast response Dr YAN

Ali

Fri, 08/26/2016 - 23:33

1-Video is very  fantastic ,but really i want reference for thioretical information of clusters.

2- if i have this cluster:

Cluster 1
Number of voxels: 60
Peak MNI coordinate: -36 -78 -45
Peak MNI coordinate region:  // Left Cerebellum // Cerebellum Posterior Lobe // Inferior Semi-Lunar Lobule // undefined // undefined // Cerebelum_Crus2_L (aal)
Peak intensity: 4.2667
# voxels structure
   60 --TOTAL # VOXELS--
   57 Left Cerebellum
   57 Cerebellum Posterior Lobe
   42 Cerebelum_Crus2_L (aal)
   24 Inferior Semi-Lunar Lobule
   18 Pyramis
   11 Tuber
    3 Uvula
    2 Cerebelum_Crus1_L (aal)
    1 Cerebellar Tonsil
my questions :
2.1-the nomber of these voxels (42Cerebelum_Crus2_L+2 Cerebelum_Crus1_L)  are  the activated voxels  and (60-44) not activated?
2.2-if the number of voxel is very small like 2 Cerebelum_Crus1_L (aal), is this region active region or not?
2.3- if the region repeated in two or more clusters what does mean that?
2.4- if I set cluster size with 13 voxels, can i take the 2 Cerebelum_Crus1_L (aal)  as activation region?
2.5-Based on what these regions included in this cluster?
2.6- Peak intensity: 4.2667: is this the peak value for the region that have maximum voxels in the cluster?
3- I have  P-value  after  FDR correctin =0.0037 , rmm=6 and 4mm gaussian smmoth , how many voxels in cluster size?
Are P- values in this image after FDR correction or before?
 
 
 
thanks for your help Dr YAN.