◼ Bladder: draw the Bladder LEDR on Axial Planning images. The system will keep the predicted dose
at a safety distance of 2mm from the drawing.
1. Click on the desired Planning image (the drawing starting point) to display it in the selected image
window.
2. Click the relevant LEDR Drawing button (see options in Section 6.7.1). In the selected image window,
click on the desired location to start the LEDR outline.
3. Move the cursor in one direction, while pressing the left mouse button or by clicking on successive
points to create the LEDR outline.
4. Click the box at the end of the line to close the LEDR drawing.
5. Continue to define the LEDR on all required slices.
6. Unclick the LEDR button or alternatively click on another drawing button and the system will
automatically interpolate the drawing. Verify the automatic interpolation of the LEDR is correct in
all slices.
7. Move the drawing by clicking and dragging it. Delete the drawing by clicking it and the Delete (or
Delete All) button.
◼ Proper drawing of LEDR contours can prevent injury to the patient during
treatment. The treating physician should identify the sensitive regions which are
candidates for LEDR drawings.
◼ If Interpolation was used when drawing the rectal wall and LEDR’s, manually check
the interpolation results in all slices. If the interpolation action failed to achieve the
desired results, delete the interpolated contours, and manually draw additional
contours in the necessary locations.
[W-17]
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