Not exactly sure what you are asking..if 2 groups pts and controls, all_fa_skeletonised would represent fa values across entire sample. Deproject into individual fa skeletons (with fslsplit), and then use fslmaths to calculate fa for each group (run twice with two separate groups of input).
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Garin, Alba
Sent: Friday, October 07, 2011 10:22 AM
To: [log in to unmask]
Subject: Re: [FSL] tbss output
Hi Christine,
Now I understand what you meant. Is it more correct to do this in all_FA or all_FA_skeletonised? What are the differences?
Thanks in advance,
Alba
Alba Garin Muga
Computer Science PhD Student
Applied Mechanics Department
Paseo Manuel Lardizabal, 15
20018 Donostia-San Sebastian. Spain
Tel. +34 943 212 800 (Ext. 2111)
Fax: +34 943 213 076
Web: www.ceit.es
Antes de imprimir este e-mail piense bien si es necesario hacerlo. El medioambiente es cosa de todos.
Before printing this e-mail ask yourself if you really need a hard copy. We are all responsible for the environment.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Christine Zakrzewski
Sent: viernes, 07 de octubre de 2011 16:13
To: [log in to unmask]
Subject: Re: [FSL] tbss output
Hi Alba. You would use fslspilit to deproject 4D skeleton into 3D components, then use fslmaths to calculate the mean FA for each group separately.
Christine
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Garin, Alba
Sent: Friday, October 07, 2011 3:32 AM
To: [log in to unmask]
Subject: Re: [FSL] tbss output
Hi Christine,
But in all_FA_skeletonised i have the FA_skeleton of each subject of the study,am I wrong? so how I can get the FA mean statistics per group?
Thanks in advance,
Alba
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Christine Zakrzewski
Sent: jueves, 06 de octubre de 2011 19:45
To: [log in to unmask]
Subject: Re: [FSL] tbss output
You can use fslsplit--to split the 4D all_FA_skeletonised image output from TBSS into single 3D images.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Garin, Alba
Sent: Thursday, October 06, 2011 11:51 AM
To: [log in to unmask]
Subject: [FSL] tbss output
Hi everyone,
when processing statistics in TBSS, we obtain different outputs, such as Mean_FA, Mean_FA_skeleton...
As we use all the subjects (patients and controls) for the statistics, i suppose that for example the mean_FA image is the mean of all the subjects, no? (controls and patients). I mean, in each voxel of the image we have the mean value of the all images, havent we?
so... in order to get some statistics of rois of a group of patients (not all the subjects, only patients), how should i do the tbss steps? i want to get some numerical information to display a table with my results for each group.
thanks in advance,
Alba Garin
PhD student
Applied Mechanics
CEIT - San Sebastian
Spain
The information in this transmission is intended for official use of the Kessler Foundation. It is intended for the exclusive use of the persons or entities to which it is addressed. If you are not an intended recipient or the employee or agent responsible for delivering this transmission to an intended recipient, be aware that any disclosure, dissemination, distribution or copying of this communication, or the use of its contents, is strictly prohibited. If you received this transmission in error, please notify the sender by return e-mail and delete the material from any computer.
|