6.9. Re-Draw / Dose Transfer (Optional)
In the event of a large patient movement and a need to acquire new Planning images, it is possible to
manually define a rigid registration between the new MR images and the prior MR images, based on
anatomical structures (the prostate capsule). By doing this, the system will automatically copy the
accumulated dose volume to the new MR images.
6.9.1. Acquiring New Planning Images
1. In case sonications were already performed, go back to Planning stage by
pressing on the main toolbar.
2. Acquire new Planning images – see Section 6.5.
3. Acquire a new Baseline Anatomy scan – see Section 6.6.
6.9.2. Dose Transfer Procedure
After loading a new Axial series of MR planning images, all the previously drawn objects except for the
prostate capsule and the ROT are deleted.
The prostate capsule, ROT and the accumulated dose are automatically copied to the new MR Planning
images.
1. At this stage, the prostate capsule as well as the ROT are rigid structures and cannot be moved or
edited slice by slice.
2. Carefully review the prostate capsule and the ROT volumes. Drag and rotate each of them to
achieve the best possible fit to the anatomy as demonstrated in the new Planning images. Rotation
can be achieved by clicking and dragging the handle (see Figure 6-10).
3. Perform adjustments in all orientations (Axial, Sagittal and Coronal). The accumulated dose volume
will be adjusted accordingly.
4. In case an accurate adjustment cannot be achieved, the prostate capsule and ROT structures can
be completely deleted and re-drawn.
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