[IGSTK-Users] On electronic magnetic tracking system

[Ziv Yaniv]

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/