Virtual Colonoscopy Program

The program is designed for analyzing the lumen of the colon in computed tomography
The program automatically

• segments the colon
• builds the centerline of the colon
• presents an endoscopic mode and a dissection view

Launching the "Virtual Colonoscopy" Program

• Click in the tool panel, "Studies" group, on the "Programs" button
• Click on the "Virtual Colonoscopy" button
• The screen will split into 4 panels to display the colon:
  • dissection view with a 3D cursor and a camera position cursor in the form of a vertical line on it
  • endoscopic mode (endo mode)
  • axial MPR projection with a 3D cursor
  • 3D model of the segmented colon with a centerline and a schematic representation of the camera as a bell
• To the left of the display panels - the control panel:
  • Bowel - if automatic segmentation erroneously cut off a part of the colon, left-click to place a checkmark next to the cut-off (no checkmark) fragment
    It will appear on the screen
  • Length - indicates the length of the colon from the anus to the dome of the cecum in mm
  • Position - indicates the camera position from the anus in mm
    Clicks on the up/down arrows and entering a number in the field allow precise movement of the camera
    Move the camera faster using the slider located below, or by holding the left mouse button on the camera "bell" in the 3D model and moving the mouse
  • Buttons and start the video mode from the anus to the cecum dome and back
  • Button places a 3D marker
  • Buttons and switch the current view to MPR+3D mode and back
  • In the Finds field, placed markers are located

Camera Control

Manual Control

• Use the camera position slider (from the anus)
• Use the arrows to the right of the camera position number
• Use the slider in the endoscopic mode panel
• Use the vertical line on the dissection panel
• Use the camera image ("bell") on the 3D model

Automatic Control (Playback, Video Mode)

• Button from the anus to the cecum dome
• Button - in the opposite direction

Evaluation of Pathological Foci

Detection of Pathological Foci

• In the active overlay of the endo mode, click the mouse to select Colon Lumen
• Pathological foci will not be colored

Measuring Pathological Foci

• Using the button place 3D marker on the pathological focus in the endo mode
• The 3D marker and 3D cursor will appear in the area of interest on all panels
• Using the button switch to the MPR+3D view
• Press the key if the 3D marker and 3D cursor interfere with measurements
• Select the necessary measurement from the Tool Panel and measure the parameter
• Return to the colonoscopy mode by clicking the button .

Marker List

• Selecting a Marker
  In the marker list, left-click on the button "Marker 1" (2,3...)
• Renaming a Marker
  Hover the mouse cursor over the marker in the list
  Left-click on the "Rename" button
• Deleting a Marker
  Hover the mouse cursor over the marker in the list
  Left-click on the "Delete" button

Saving Results

Saving Reconstructions in Vidar Dicom Viewer

Saving for Transfer to Patients and Other Medical Institutions

Exiting the "Virtual Colonoscopy" Program Mode