6. Continue to define the prostate capsule on all additional slices (draw on every second or third Axial
slice).
7. Unclick the Draw Prostate Capsule button or alternatively click on another drawing button and the
system will automatically interpolate the drawing. Verify the automatic interpolation of the prostate
capsule is correct in all Axial slices.
8. Move the drawing by clicking and dragging it. Delete the drawing by clicking it and the Delete (or
Delete All) button.
6.7.4. Define the Region of Treatment (ROT)
The ROT is a mandatory drawing; the Exablate workstation will not allow you to proceed to Treatment stage
prior to drawing it.
The ROT drawing defines the volume to be treated within the prostate capsule. The workstation planner
covers the ROT volume with Macro spots, while taking into account LEDR limitations (see Section 6.7.6).
There are two options for defining the ROT:
Option 1: Automatically expand the Target Volume with customizable margins
1. Click on an image from the Axial Planning or Additional Planning Series (the drawing starting point)
to display it in the selected image window.
The Target Volume can be defined either on Axial Planning Images or on the Additional Planning
Images (e.g., DWI), but not on both simultaneously.
2. Press this button in the selected image window, click on the desired location to start the
Target Volume outline.
3. Move the cursor in one direction, while pressing the left mouse button or by clicking on successive
points to create the Target Volume outline.
4. Complete a non-intersecting polygon.
5. Click the box at the end of the line to close the Target Volume polygon.
6. Continue to define the Target Volume on all additional slices (as required). Do not add intentional
margins.
7. Unclick the Draw Target Volume button or alternatively click on another drawing button and the
system will automatically interpolate the drawing. Verify the automatic interpolation of the prostate
capsule is correct in all Axial slices.
8. Move the drawing by clicking and dragging it. Delete the drawing by clicking it and the Delete (or
Delete All) button.
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