AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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Daniel Glen
September 16, 2009 01:33PM
You can use the 3dclust command to give you the center of mass coordinates (RAI) by specifying an atlas region as the input dataset. The 2nd through the 4th columns are the coordinates of the center of mass for each region (left and right). Here is an example for the two regions you asked about.

% 3dclust 2 2 'TT_Daemon::Brodmann_Area_22'
++ 3dclust: AFNI version=AFNI_2008_07_18_1710 (Sep 4 2009) [64-bit]
++ Authored by: RW Cox et al
#
#Cluster report for file TT_Daemon::Brodmann_Area_22
#[Connectivity radius = 2.00 mm Volume threshold = 2.00 ]
#[Single voxel volume = 1.0 (microliters) ]
#[Voxel datum type = byte ]
#[Voxel dimensions = 1.000 mm X 1.000 mm X 1.000 mm ]
#[Coordinates Order = RAI ]
#Mean and SEM based on Absolute Value of voxel intensities:
#
#Volume CM RL CM AP CM IS minRL maxRL minAP maxAP minIS maxIS Mean SEM Max Int MI RL MI AP MI IS
#------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ------- ------- ------- ----- ----- -----
7687 -57.6 23.2 5.4 -70.0 -37.0 -13.0 61.0 -6.0 22.0 99 0 99 -54.0 -13.0 -6.0
7660 56.8 23.0 5.4 35.0 69.0 -13.0 61.0 -6.0 22.0 99 0 99 49.0 -13.0 -6.0
#------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ------- ------- ------- ----- ----- -----
# 15347 -0.5 23.1 5.4 99 0
% 3dclust 2 2 'TT_Daemon::Brodmann_Area_44'
++ 3dclust: AFNI version=AFNI_2008_07_18_1710 (Sep 4 2009) [64-bit]
++ Authored by: RW Cox et al
#
#Cluster report for file TT_Daemon::Brodmann_Area_44
#[Connectivity radius = 2.00 mm Volume threshold = 2.00 ]
#[Single voxel volume = 1.0 (microliters) ]
#[Voxel datum type = byte ]
#[Voxel dimensions = 1.000 mm X 1.000 mm X 1.000 mm ]
#[Coordinates Order = RAI ]
#Mean and SEM based on Absolute Value of voxel intensities:
#
#Volume CM RL CM AP CM IS minRL maxRL minAP maxAP minIS maxIS Mean SEM Max Int MI RL MI AP MI IS
#------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ------- ------- ------- ----- ----- -----
1772 -53.9 -10.6 12.5 -63.0 -41.0 -18.0 2.0 6.0 22.0 120 0 120 -51.0 -18.0 6.0
1752 52.9 -10.6 12.5 40.0 61.0 -18.0 2.0 6.0 22.0 120 0 120 44.0 -18.0 6.0
#------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ------- ------- ------- ----- ----- -----
# 3524 -0.8 -10.6 12.5 120 0
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Subject Author Posted

Talairach coordinates for Broadman Area 22 and 44

Virendra September 15, 2009 03:47PM

Re: Talairach coordinates for Broadman Area 22 and 44

Daniel Glen September 16, 2009 01:33PM