[slicer-users] Buffering and tracking speed of locator in Slicer 3

Haiying Liu hliu at bwh.harvard.edu
Wed Feb 10 08:20:05 EST 2010

Hi Stella,

See my questions below:

stella ang wrote:

> Hi all,
> Just checking,
> If the tracking speed of the locator in Slicer 3 is relatively slow
> (ie. the locator moves 1st, the corresponding segments - axial,
> saggital and coronal are lagged by about 2-3 secs), which parameter(s)
> should I adjust?

I assume you use IGSTK to get tracking data from Aurora. Inside the xml
file, you can specify your frame rate.

> I'm using Aurora medical tracking device and the above issue has
> affected the overall efficiency of the system.
> Another thing is, what does 'invert' means in the Transforms modules?
> Is it necessary for me to use it for Neuronav navigation?

Transform is basically specified by a 4x4 matrix. You will get the
inverse of the transform matrix if you press "Invert." You don't need it
in NeuroNav.

> Thanks for the help.
> Stella
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