@article{fichtinger2016j,

title = {Current sensing for navigated electrosurgery: Proof of concept},

author = {Kaci Carter and Andras Lasso and Tamas Ungi and Evelyn Morin and Gabor Fichtinger},

url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9786/97861Y/Current-sensing-for-navigated-electrosurgery-proof-of-concept/10.1117/12.2216094.short},

year  = {2016},

date = {2016-01-01},

volume = {9786},

pages = {593-600},

publisher = {SPIE},

abstract = {PURPOSE: Tracked power-tools are routinely used in computer-assisted intervention and surgical systems. In order to properly perform temporal and spatial monitoring of the tracked tool with the navigation system, it is important to know when the tool, such as an electrosurgical cauterizer, is being activated during surgery. We have developed a general purpose current sensor that can be augmented to tracked surgical devices in order to inform the surgeon and the navigation system when the tool is activated. METHODS: Two non-invasive AC current sensors, two peak detector circuits, one voltage comparator circuit, and a microcontroller were used to detect when an electrosurgical cauterizer is being powered on and differentiate between the cut and coagulation modes. The system was tested by cauterizing various substances at varied power ratings. RESULTS: By comparing the ratio of amplitudes as well as the …},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Ungi2015b,

title = {Navigated breast tumor excision using electromagnetically tracked ultrasound and surgical instruments},

author = {Tamas Ungi and Gabrielle Gauvin and Andras Lasso and Caitlin T Yeo and Padina Pezeshki and Thomas Vaughan and Kaci Carter and John Rudan and C. Jay Engel and Gabor Fichtinger},

url = {http://www.ncbi.nlm.nih.gov/pubmed/26302503

https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Ungi2015b.pdf},

doi = {10.1109/TBME.2015.2466591},

issn = {0018-9294},

year  = {2015},

date = {2015-08-01},

urldate = {2015-08-01},

journal = {IEEE Transactions on Biomedical Engineering},

abstract = {<h4>OBJECTIVE:</h4> 

<p>Lumpectomy, breast conserving tumor excision, is the standard surgical treatment in early stage breast cancer. A common problem with lumpectomy is that the tumor may not be completely excised, and additional surgery becomes necessary. We investigated if a surgical navigation system using intraoperative ultrasound improves the outcomes of lumpectomy, and if such a system can be implemented in the clinical environment.</p> 

<h4>METHODS:</h4> 

<p>Position sensors were applied on the tumor localization needle, the ultrasound probe, and the cautery, and three-dimensional navigation views were generated using real time tracking information. The system was tested against standard wire-localization procedures on phantom breast models by eight surgical residents. Clinical safety and feasibility was tested in six palpable tumor patients undergoing lumpectomy by two experienced surgical oncologists.</p> 

<h4>RESULTS:</h4> <p>Navigation resulted in significantly less tissue excised compared to control procedures (10.3 ± 4.4 vs. 18.6 ± 8.7 g},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Carter2015a,

title = {Visual feedback mounted on surgical tool},

author = {Kaci Carter and Andras Lasso and Tamas Ungi and Evelyn Morin and Gabor Fichtinger},

year  = {2015},

date = {2015-03-01},

pages = {36},

keywords = {},

pubstate = {published},

tppubtype = {article}

}