@conference{Lund2019a,

title = {Controlling virtual views in navigated breast conserving surgery},

author = {Shaun Lund and Thomas Vaughan and Tamas Ungi and Andras Lasso and Mark Asselin and Caitlin Yeo and C. Jay Engel and Gabor Fichtinger},

year  = {2019},

date = {2019-01-01},

urldate = {2019-01-01},

booktitle = {SPIE Medical Imaging 2019},

abstract = {<p><strong>PURPOSE</strong>: Lumpectomy is the resection of a tumor in the breast while retaining as much healthy tissue as possible.<br /> 

Navigated lumpectomy seeks to improve on the traditional technique by employing computer guidance to achieve the<br /> 

complete excision of the cancer with optimal retention of healthy tissue. Setting up navigation in the OR relies on the<br /> 

manual interactions of a trained technician to align three-dimensional virtual views to the patient’s physical position<br /> 

and maintain their alignment throughout surgery. This work develops automatic alignment tools to improve the<br /> 

operability of navigation software for lumpectomies.<br /> 

<strong>METHODS</strong>: Preset view buttons were developed to refine view setup to a single interaction. These buttons were<br /> 

tested by measuring the reduction in setup time and the number of manual interactions avoided through their use. An<br /> 

auto-center feature was created to ensure that three-dimensional models of anatomy and instruments were in the center<br /> 

of view throughout surgery. Recorded data from 32 lumpectomy cases were replayed and the number of auto-center<br /> 

view shifts was counted from the first cautery incision until the completion of the excision of cancerous tissue.<br /> 

<strong>RESULTS</strong>: View setup can now be performed in a single interaction compared to an average of 13 interactions<br /> 

(taking 83 seconds) when performed manually. The auto-center feature was activated an average of 33 times in the<br /> cases studied (n=32).<br /> 

<strong>CONCLUSION</strong>: The auto-center feature enhances the operability of the surgical navigation system, reducing the<br /> 

number of manual interactions required by a technician during the surgery. This feature along with preset camera view<br /> 

options are instrumental in the shift towards a completely surgeon-operable navigated lumpectomy system.</p>},

keywords = {},

pubstate = {published},

tppubtype = {conference}

}