[IGSTK-Users] On electronic magnetic tracking system

[Jia Fucang]

Hi Ziv,

Thank you very much for your evaluation for EM tracking system. Now I am
clear
no it and I will read the paper first.

Best,
Fucang

On Wed, Nov 4, 2009 at 10:54 PM, Ziv Yaniv <zivy at isis.imac.georgetown.edu>wrote:

> Hi Fucang,
>
> From our evaluation (done about 1.5 years ago) both Aurora and MedSafe had
> no perceived latency issues. As to refresh rate, the MedSafe refresh rate
> was 160Hz and did not depend on the number of tools used. For the Aurora the
> refresh rate was 40Hz when using one tool and dropped to 20-25Hz when using
> multiple tools. This was still good enough for most of our applications.
> Also, NDI has informed us that this issue has since been resolved and that
> the refresh rate is 40Hz even when all tools are connected (we haven't
> tested this). For all the details please see the paper:
>
> "Electromagnetic Tracking in the Clinical Environment", Z. Yaniv, E.
> Wilson, D. Lindisch, K. Cleary, Med. Phys., Vol. 36(3), pp. 876-892, 2009.
>
>                     regards
>                         Ziv
>
> Jia Fucang wrote:
>
>> Hi all,
>>
>> We are going to buy one electronic magnetic tracking system, currently
>> only
>> NDI Aurora and Ascension 3D Guidance medSAFE are in consideration. But I
>> noticed
>> that there are a word says that "medSAFE has observable delay when
>> tracking multiple tool",
>> when will it occur? with how much tracking tools?
>>
>> The current surgery we are working is spine surgery, and during the
>> navigation two or three
>> tools are in tracking in one time.
>>
>> Thank you for any hints.
>>
>> Best,
>> Fucang
>>
>>
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>
>
> --
> Ziv Yaniv, PhD., Research Assistant Professor
> Imaging Science and Information Systems (ISIS) Center
> Department of Radiology
> Georgetown University Medical Center
> 2115 Wisconsin Avenue, Suite 603
> Washington, DC, 20007,
>
> Phone: +1-202-687-7286
> Fax: +1-202-784-3479
> email: zivy at isis.georgetown.edu
> web: http://isiswiki.georgetown.edu/zivy/
>
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