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3D MRI Techniques and Cochlear Implants

Healthy Hearing Interview NEWS Brief
David Schramm M.D.,Neurotologist
Ottawa, Canada


3D Fiesta MRI Radiologic Techniques and Cochlear Implants

Beck: Good Morning David. Its a pleasure to meet you. I know you went to medical school in Toronto and graduated in 1983. Where did you do your residency and otology and neurotology fellowship?

Schramm: I did my residency in Ottawa, Canada and my fellowship in otology and neurotology in Chicago. I did some vestibular research work in Springfield, Illinois, too and I finished my fellowship in 1989. Ive been at the University of Ottawa ever since.

Beck: When did you start the cochlear implant program up there?

Schramm: We started it officially in 1992. It took some time for the Province of Ontario to decide to fully fund cochlear implants. Presently we do almost 60 cochlear implants per year.

Beck: Thats very impressive. Do you personally implant children and adults?

Schramm: Yes, I do operate on adults and children, and our team has implanted over 400 cochlear implants since we started the program.

Beck: David, you presented at the CI-2005 meeting in Dallas on new MRI radiologic techniques, and the wonderful people that worked so hard to put together that amazing meeting even allowed me to attend! I must say, the meeting was nothing short of phenomenal! But, back to the topic at hand.What can you tell me about the new 3D Fiesta MRI technique and the advantages of the 3D technique as compared to the traditional MRI with gadolinium?

Schramm: The 3D Fiesta Technique is used at our pediatric hospital. It has the advantage that one can view the cochlea and the auditory nerves from any of the 3 dimensions. So it is a very useful pre-op assessment tool. The 3D technique allows the T2 weighted technique to be viewed, turned, angled and manipulated on the computer screen.



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Beck: So you can view the anatomy from angles and views that
actually were not individually recorded?

Schramm: Yes, thats exactly the idea. You can think of it as the software filling in the details.

Beck: Does that help you pre-operatively with respect to knowing the potential for full electrode insertion as well as the status of the auditory nerve?

Schramm: Yes it does. Although we use both devices, we frequently use the Advanced Bionics device, the HiRes 90K with the pre-curved perimodiolar electrode, and our results have been excellent. Weve implanted 34 adults and 10 children and each has had a full insertion. The 3D imaging has proven to us that it has value in patient selection and pre-operative counseling, too.

Beck: Thanks for your time David.

Schramm: My pleasure, Doug.


For more information on Advanced Bionics, visit www.bionicear.com

For more information on Ottawa Hospital, visit www.ottawahospital.on.ca

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