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<div style="direction:ltr; font-family:Tahoma; color:#000000; font-size:10pt">Hi,<br>
<br>
I have recently started to use N4 as a command line installation and the bias field correction works great in general.
<br>
<br>
I am trying to figure out how to configure the flags for best performance on our T2 MRI images and when trying the rescale intensities I get the error message "segmentation fault 11" for both options ( -r 1 as well as -r 0). I also have a problem with the
convergence flag -c, all works fine when I leave this flag out but when trying for example -c 50x50x50x50,0.0001 it stops after 1 iteration (Current level = 1<br>
Iteration 1 (of 50). Current convergence value = 0.000816419 (threshold = 0.001). It does not seem like my specification of the threshold is read but the default value is used. Do you have an example of a typical setting for the -c flag other than the default
values?<br>
<br>
best regards<br>
Erik<br>
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<div style="font-family:Tahoma; font-size:13px"><font size="2"><span style="font-size:10pt"><font size="1">Erik Olsson<br>
PhD</font> <font size="1"><br>
<br>
Institute of Psychiatry and Neurochemistry</font> <font size="1"><br>
Department of Neuroscience & physiology<br>
The Sahlgrenska academy<br>
Gothenburg University</font><br>
<font size="1">Sweden</font></span></font></div>
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