@article {Vaughan2019a,
	title = {Needle Navigation and Catheter Reconstruction for Breast Brachytherapy Using Open Source Software},
	journal = {Acta Polytechnica Hungarica},
	volume = {16},
	number = {8},
	year = {2019},
	month = {09/2019},
	pages = {99-118},
	abstract = {<p><em>Abstract: Interstitial breast brachytherapy is a method to deliver radiation therapy directly to the site of cancer. It is a challenging procedure because of issues in localizing the seroma, needles, and catheters within the soft tissue. In this paper we present two open-source technologies based on electromagnetic tracking: a navigation system to help target needles using a tracked needle guide, and software for electromagnetic reconstruction of catheter paths. These technologies were validated phantom studies. We found that the navigation system helped a radiation oncologist to target needles more accurately than under ultrasound guidance (60 needles under each condition, 3.8 vs 3.3 mm placement error, p = 0.04) and that reconstructed catheter paths were accurate within 0.6 mm to those determined on CT scans (144 catheters were compared to the 1.2 mm voxel size of CT scans, p \&lt; 0.001). We conclude that these technologies accurately localize anatomy and instruments in our study.</em></p>
},
	author = {Thomas Vaughan and H Brastianos and Tamas Ungi and Andras Lasso and Conrad Falkson and Gabor Fichtinger}
}
