How you prepare

By Mayo Clinic Staff

An MRI uses a magnetic field to create detailed pictures of the inside of your body. Metal objects on — or in — your body may interfere with the magnetic field used during the exam, affecting the quality of the MRI and possibly causing a safety problem. The magnetic field may also damage electronic items.

  • If possible, leave jewelry or metal or electronic accessories at home, as you'll be asked to leave these items in the dressing room before the procedure.
  • Tell the technologist if you have any metal or electronic devices inside your body, such as metallic joint prostheses, artificial heart valves, implanted electronic devices, cochlear implants, body piercings or dental implants.

Focused ultrasound surgery is performed as an outpatient procedure in an MRI scanning room. The day of treatment you'll need to shave your lower abdomen between your pubic bone and bellybutton.

Shortly before the procedure begins, you'll:

  • Have an intravenous line placed in one of your veins to inject contrast material for MRI and to give you medication for relaxation and pain
  • Be offered earplugs because the internal part of the magnet produces repetitive tapping, thumping sounds and other noises
  • Have special stockings to prevent blood clots put on your legs
  • Have a urinary catheter inserted into your bladder to keep the bladder stable during your treatment and improve visibility of the uterus
Jun. 01, 2013