Segmentation Fault: 11

Submitted by willi3by on Tue, 09/17/2019 - 13:12


I am trying to run DIFFPREP and I am getting the following error message:

Denoising DWIs...

Segmentation Fault: 11


The data that I am using is 220 total volumes with 3 shells (1000, 2000, 3000). I know this error is sometimes caused by memory issues but I have 32GB of RAM, which should be plenty I think. Does anyone know what may be causing the issue? 




Motion estimate

Submitted by sarllsjo@mail… on Tue, 08/27/2019 - 14:15

Hello Tortoise Support!

What is the most straightforward way to get an estimate of my subject's head motion from the pre-processing pipeline?  Can the parameters from the rigid-body registration of each volume be extracted from one of the output files?

Thanks, Joelle


SyN registration

Submitted by hoptman on Mon, 07/22/2019 - 18:05

Hi all,

I am trying to use TORTOISE to susceptibility-induced distortion correction on my DTI and I've selected the option ANTSSyN, However, in the log files, I am not seeing a nonlinear registration file, or even an affine registration file. I also don't see a reference to a nonlinear registration in the console window. Moreover, I see some areas where the deformation is not quite working. Am I missing something?

re: rodent data

Submitted by nmskhan on Tue, 07/16/2019 - 17:08


I was trying to run the rodent data on the tortoise, i was not sure about what is big bang in the diffprep module. What are the correct default settings for rodent data, all I have is, a 2 b-values, 14 directions, spin-echo based DTI data? Anything I have to uncheck before running this?

what is big delta and small delta in the import module? is this time between two diffusion gradients and separation? or something else?