Natural Head Position (NHP)

During (CB)CT scanning, the patient’s head is not always orientated in a standard and optimal way. If needed, adjust the head position in IPS CaseDesigner^® to closely match the natural head position.

Evaluate the patient's head position on the hard and the soft tissue in the wizard's frontal and lateral view.

Tip

Change the soft tissue transparency by clicking Transparency and moving the transparency slider. Transparency is by default set to 50%.

The natural head position can be edited at any time.

The 3D patient model can be orientated in the NHP by translating and rotating the model in the 3D viewers. Make sure to select the appropriate mode. When the Translation button is highlighted, the wizard is in translation mode. Click Rotation to switch to rotation mode. The Rotation button is highlighted.

Tip

Use the Tab key on the keyboard to switch between rotation and translation.

Reference lines in the frontal or right lateral viewers assist you in setting the model in the correct position. The Frontal viewer shows the facial midline and the Frankfurt Horizontal. The Frankfurt Horizontal continues in the Right lateral viewer, which also shows the true vertical.

Rotation

Activate Rotation mode. The Rotation button is highlighted. Click the scene and drag to rotate the model.

	Where	Action
Yaw	In the frontal or the right lateral viewer	Move the mouse left and right on the model.
Roll	In the frontal viewer	Move the mouse up and down outside the model.
Pitch	In the right lateral viewer	Move the mouse up and down outside the model.

Translation

Activate Translation mode. The Translation button is highlighted. Click the patient model and drag it to the correct position.

	Where	Action
Move sideways	In the frontal viewer	Move the mouse left and right.
Move forward and back	In the right lateral viewer	Move the mouse left and right.
Move up and down	In the frontal or right lateral viewer	Move the mouse up and down.

Reset Position

Click Reset position reset icon to restore both viewers to the original position as it was retrieved from the scanned data.