Dear Rocio,
the navigation tutorial requires you to have a tool which is already
calibrated to the tip. For the well-known NDI trackers you can use the
trackers software to, e.g. do a pivot calibration for finding the tip.
However, we also added features to calibrate the tip inside MITK. I'm
sorry that the documentation of the IGT Navigation Tool Calibration view
is not complete yet. In a recent task we also added a pivot calibration
feature to this view. It's included in the v2016.11.2-igt
<https://phabricator.mitk.org/source/mitk/history/master/;v2016.11.2-igt> version,
which we just tagged a few days ago. It is based on the 2016-11 release.
All features are also included in the current master.
Regarding your other questions:
- Changing the UI to set double values instead of integers makes sense.
In can be changed in the QmitkNavigationToolCreationAdvancedWidget class
of the module IGTUI. Maybe you can file a task for this in phabricator?
- If you save the calibration it is directly applied to the tip by
changing the parameters of the navigation tool object (available as
microservice) which you selected before. However, you can also save the
calibrated navigation tool file to the harddisc by pressing "Save the
Calibrated Navigation Tool" and load it again later. All available tool
storages (each including a number of navigation tools) can be edited in
the IGT Navigation Tool Manager view.
I hope this helps.
Best,
Alfred Franz
Am 25.07.2017 15:12, schrieb LOPEZ VELAZCO, ROCIO:
Hello,
I am working in Image Guided Therapy and I would like to use MITK to
navigate a real model from which I have a stl 3D model to load in
MITK. I am trying to perform the navigation tutorial
<http://docs.mitk.org/2016.03/org_igttrackinglab.html> but from step
"Configuration" you jump to "Initial Registration" and here I am
missing the Tool Calibration step. You have some indications to use
the IGT Navigation Tool Calibration
<http://docs.mitk.org/nightly/org_mitk_views_calibrationtoolmanager.html>,
but if I don't have any tool already calibrated I have to use the
Manual Calibration, is that right? So, to set the tip of a pointer I
would only need a translation transformation (an offset):
- How should I know where exactly the tip of the pointer is? Because I
see I have to move the translation sidebars and I move a red point in
the scene (and I compare with the green point which is the one I am
tracking).
- Why I can't put decimals in the translation? I can only set integers
and it is not accurate, I am sure there is a way to change that...
- Once I set the offset (I imagine I have a good offset), how could I
apply this offset to the tool all the time? I see that I can "Save the
Calibrated Navigation Tool" but what I am suppose to do then? charge
that new tool when connecting the tracker?
I am a bit lost and I do not find documentation about all this, any
help would be very appreciated!
I would be very gratefull if someone that has navigated using MITK
tells me his/her experience :)
Thank you very much in advance!
Best regards,
Rocío López
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