[Mristudio-users] problem calculating Tensor, ADC Map

[susumu mori]

Please make sure that you didn't put 0 or a negative value at "b-value"
section.

On Sun, Nov 14, 2010 at 12:05 PM, Kevin Spitler <kevinspitler at ucla.edu>wrote:

> Hi,
>
> I am able to load my data into DTI Studio and can (on the DtiMap tab) run
> Original ADC Mean STD
> Mean (DWIs, B0s)
>
> My problem is that when I try either Calculation >> Tensor , Color Map, etc
> or Calculation >> ADC Map
>
> I get completely black views for axial, sagital, and coronal (and the
> 3d view in the upper left).  I do not get an error message.  What
> could be causing this?
>
> I get the same results regardless of choosing "create a mask image
> based on the background noise level 10" or choosing to "Select a mask
> image b0"
>
> I am using DTI Studio 3.0.3 (Sept 2010) on Windows 7 OS.
>
> My old data files load and I can do tractography on my old data.
>
> I am using Siemens Gradient:
> 0: 0, 0, 0
> 1:  1.000000, 0.414250, -0.414250
> 2:  1.000000, -0.414250, -0.414250
> 3:  1.000000, -0.414250, 0.414250
> 4:  1.000000, 0.414250, 0.414250
> 5:  0.414250, 0.414250, 1.000000
> 6:  0.414250, 1.000000, 0.414250
> 7:  0.414250, 1.000000, -0.414250
> 8:  0.414250, 0.414250, -1.000000
> 9:  0.414250, -0.414250, -1.000000
> 10:  0.414250, -1.000000, -0.414250
> 11:  0.414250, -1.000000, 0.414250
> 12:  0.414250, -0.414250, 1.000000
>
> Thanks for your help
> Kevin
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