How to Acquire the Resection Cavity
Ensure instruments are calibrated for use using Cranial.
For further information, see Cranial ENT Software User Guide.
Move your instrument into position, ensuring it is in the camera’s field of view.
Press Start to acquire the resection cavity.
Surface Acquisition ON is displayed.
Gently move the calibrated instrument along the resection cavity, marking all points that indicate the resection cavity.
An audible tone sounds during acquisition. The tone changes when enough points are taken. No sound is heard if the navigated instrument is taken outside the pre-planned object.
Press Stop when complete.
Alternatively, press Stop to temporarily halt point acquisition, if needed.
Intraoperative Structure Update calculates the residual area, creating a new object.
The 2D views update during acquisition and the 3D view updates after acquisition.
Verify the calculated surface of the new Intraoperative Structure Update object.
If needed, use Reset to discard your calculated surface.
Alternatively, press Start again (see step 3), to continue further point acquisition.
Select Done when complete.
A new object is saved in Patient Browser, with the following format:
Original name + the residual volume. E.g., “tumor 75%”.
The new object is available for use in other applications e.g., Cranial navigational use. If needed, the original object can be reselected from Patient Browser.
Always select Done to save updated objects for later use in other applications or to export. Pressing the Home button does not save or create new objects.
How to Verify the Calculated Surface Accuracy
Hold the instrument to landmarks within the resection cavity and verify that the position of the instrument displayed in the image views corresponds with the actual point on the patient’s anatomy.
If inaccuracies exist, re-acquire the surface or add additional points.
|Percentage of original object|
Original object volume
Percentage remaining of original object
Outline of original object