Post Processing

Post Processing offers convenient cropping features for CT reconstruction volumes. A CT volume can be cropped either circularly around the volume vertical axis or by number of pixels along volume dimensions.

Input

  • CT reconstruction volume.
  • X-ray projections with corresponding ConeBeamGeometry used in the CT volume computation.

After loading both the CT volume and X-ray projections into the ImFusionSuite, select both images in the data list, right-click, and then choose Post Processing from the CT sub-menu.

../../_images/ctpostprocess_launch.png

The Post Processing algorithm controller is opened and added to the algorithm dock on the left side of the ImFusionSuite GUI.

../../_images/ctpostprocess_params.png

Parameters

In the Post Processing controller, users can adjust the following cropping parameters:

  • Crop radius: This value indicates the relative radius within the range [0.0, 1.0] for cropping to the actual detector size in the y-direction. A value of 0.0 disables cropping.
  • Crop fan: Specify the cropping mode choosing from a list of 4 available modes.
  • Crop lower: Determine the number of pixels to be cropped in 3D at the lower corner of the CT volume.
  • Crop upper: Determine the number of pixels to be cropped in 3D at the upper corner of the CT volume.
  • applyHUCalibration: Enable or disable HU calibration. For more detailed parameters and usage, refer to the Hounsfield Calibration section.

After configuring all the paramters, click the Compute button to apply the algorithm to the CT volume.

CT/Algorithms/img/ctpostprocess_compute.png

The MPR view will updated to display the output volume after applying Post Processing algorithm.

Note

The Post Processing is an in-place and irreversible operation.