Magnetic Resonance (MR) Simulation

What is MR Simulation?

MR Simulation, or “MR Sim,” is used to enhance planning for your radiation treatment. It allows us to use both MRI and CT images to better target the tumor and position you. When we position you, we may use devices called immobilizers. They are fitted to your body to help keep you from moving. They also help you stay in the position needed for treatment. Very small tattoo marks, the size of a dot, may be placed on your body to help guide your daily treatment setup.

How do I prepare for MR Simulation?

A Radiation Oncology staff member will call you before your appointment. They will ask you medical and safety screening questions.

• Please let us know if you have any metal implants.

• Follow any directions that we give you for the procedure.

• Do not bring any of the following to the treatment room:
  • Electronics devices (cell phones, tablets, wireless earbuds)
  • Metals, jewelry, watches
  • Pens, paper clips, keys, and coins
  • Hair barrettes, hair pins or lanyards
  • Any clothing with a metal zipper or snap
  • Steel toed boots or shoes

Day of the MR Simulation:

• You will be scheduled for a Simulation Prep and CT Simulation appointment in the Department of Radiation Oncology. You will have these procedures first. Then you will have your MR Sim appointment in the Radiology Department.

•  A nurse will go over an MRI safety screening form with you before the MR Sim.

• We will give you patient education information about radiation therapy. We will also give you specific information about the area on your body to be treated.  (This area is called the treatment site.)

• We may need to give you Intravenous (IV) contrast dye during your MR Sim.

• First, we will ask you some screening questions. Then you will change into a gown and an IV line will be placed in your arm.

• If you need oral (by mouth) contrast dye for your scan, we will tell you when to stop eating or drinking before the procedure.

• If your abdomen (belly area) will be scanned, we may ask you to not eat or drink for 4 hours before your appointment.

• Your first scan will be in the CT Simulation room with the Radiation Oncology Therapists and Physicist. This is where you are set up with the immobilizers and tattoo markings.

• After the scan, a nursing staff member will take you to the Radiology Department.

• There, a Radiology Technician will work with the Radiation Oncology Therapist and Physicist to set you up for your MR Sim.

After the MR Simulation:

• The Radiology Technician will remove any IV lines.

• We will schedule your radiation therapy treatment appointments.

©2022 NYU Langone Health. All rights reserved. Reviewed for health literacy. This information is not intended as a substitute for professional medical care. Always follow your health care provider's instructions.