1. Press on an Axial Planning image (the drawing starting point) to display it in the selected image
window.
2. Press this button in the selected image window, click on the desired location to start the
rectal wall outline.
3. Move the cursor in one direction, while pressing the left mouse button or by clicking on successive
points to create the rectal wall outline.
4. Press the box at the end of the line to close the rectal wall drawing.
5. The rectal wall drawing should extend about 1cm out of the treatment envelope in Axial view.
6. Continue to define the rectal wall on all additional slices (draw on every second or third Axial slice).
7. Unclick the Draw Rectal Wall button or alternatively click on another drawing button and the system
will automatically interpolate the drawing. Verify the automatic interpolation of the rectal wall is
correct in all Axial slices.
8. Move the drawing by pressing and dragging it. Delete the drawing by pressing it and the Delete (or
Delete All) button.
6.7.3. Draw the Prostate Capsule
The prostate capsule is a mandatory drawing; the Exablate workstation will not allow you to proceed to
Treatment stage prior to drawing it.
The prostate capsule is used by the workstation to detect prostate movements and deformations during
the treatment (for more information on prostate movement detection refer to Section 7.2.9).
The prostate drawing is also used to limit the predicted thermal dose from extending too far beyond it (e.g.
up to the bones and muscles), and for other temperature related calculations.
1. Click on an Axial Planning image (the drawing starting point) to display it in the selected image
window.
2. Press this button in the selected image window, click on the desired location to start the
prostate capsule outline.
3. Move the cursor in one direction, while pressing the left mouse button or by clicking on successive
points to create the prostate capsule outline.
4. Complete a non-intersecting polygon.
5. Click the box at the end of the line to close the prostate capsule polygon.
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