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What happens during the simulation?

At the simulation appointment we will be performing a treatment planning CT scan of the area to be treated, as well the surrounding tissues. Depending on the specific site to be treated, you may be asked to change into a gown. We will be positioning you on the x-ray table in the position in which you will be treated. We will make every attempt to make it as comfortable as possible for you.


It is very important to be as still as possible during simulation and the daily radiation treatments. During the simulation, special devices may be made to assist you in holding still.

Contrast Dye

Contrast dye may be administered orally or intravenously at the time of simulation to better visualize your anatomy. Please let your nurse know if you have had previous reactions to contrast. You will be asked to complete a questionnaire and sign a consent for contrast prior to the scan.  On occasion we may ask that blood work be obtained prior to the administration of contrast material.

How long is the simulation appointment?

This simulation usually takes between 1-2 hours. You are welcome to bring a music CD or a an MP3 player if there is specific music you would like to listen to during the simulation.

Will I need to keep marks on my skin?

To reproduce your position for your daily treatments, we may need to place a couple of permanent marks (tattoos the size of a freckle) on your skin.