![](https://labs.cs.queensu.ca/perklab/wp-content/plugins/staff-list/images/placeholder.png)
Shaun Lund
Undergraduate Student
School of Computing
Queen's University
Shaun is an undergraduate student in the Biomedical Computing program, research assistant in during the summer of 2018.
Lund, Shaun; Vaughan, Thomas; Ungi, Tamas; Lasso, Andras; Asselin, Mark; Yeo, Caitlin; Engel, C. Jay; Fichtinger, Gabor
Controlling virtual views in navigated breast conserving surgery Conference
SPIE Medical Imaging 2019, 2019.
@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}
}
<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>
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>