Editing Scanco Administration (section)

===Rotate with turn3d / turn2d===

The turn3d function can be used to perform a single rotation about any axis in 3d.  The turnaxis_angle input is the angle between the x, y, and z axes and the line about which the rotation will be performed.  The turnangle input is the amount to be rotated about the specified line.  To use this function to perform three sequential rotations about the image's original x, y, and z axes requires compensation for the previous rotations.

To rotate an image from the axial view in the z plane to the sagittal view in the z plane: 

<pre>
$ipl
/turn3d
  -input &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   in
  -output &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;     out
  -turnaxis_angles     90 0 90
  -turnangle           90
  -img_interpol_option        0
</pre>

No interpolation is necessary as this is "pure reformatting" (turning +-90 or 180 degrees around x,y or z axis)

For knee images, to put the femur above the tibia, you further add the step:

<pre>
/turn2d
  -input                      out
  -output                     happyFemur
  -turnangle                  270
  -turnpoint_global_not_local true
  -turnpoint                  -1 -1
  -img_interpol_option        0
 </pre>

Refer to [[Media:turn3d.pdf |'''turn3d.pdf''']] for further instructions. 


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