Tamas Heffter
Tomi Heffter was with the Perk Lab between 2009 and 2013 as software systems engineer. He continues to collaborate with the Perk Lab through one of our commercial partners, Precision Therapeutics.
Lasso, Andras; Heffter, Tamas; Rankin, Adam; Pinter, Csaba; Ungi, Tamas; Fichtinger, Gabor
PLUS: Open-source toolkit for ultrasound-guided intervention systems Journal Article
In: IEEE Transactions on Biomedical Engineering, vol. 61, no. 10, pp. 2527-2537, 2014, ISSN: 0018-9294.
@article{Lasso2014a,
title = {PLUS: Open-source toolkit for ultrasound-guided intervention systems},
author = {Andras Lasso and Tamas Heffter and Adam Rankin and Csaba Pinter and Tamas Ungi and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2014a-manuscript.pdf},
doi = {10.1109/TBME.2014.2322864},
issn = {0018-9294},
year = {2014},
date = {2014-10-01},
urldate = {2014-10-01},
journal = {IEEE Transactions on Biomedical Engineering},
volume = {61},
number = {10},
pages = {2527-2537},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Lasso, Andras; Ungi, Tamas; Pinter, Csaba; Heffter, Tamas; Rankin, Adam; Fichtinger, Gabor
6th Image Guided Therapy Workshop, vol. 6, Crystal City, VA, USA, 2013.
@conference{Lasso2013a,
title = {Prototyping Clinical Applications with the Public Library for Ultrasound (PLUS) Toolkit and 3D Slicer},
author = {Andras Lasso and Tamas Ungi and Csaba Pinter and Tamas Heffter and Adam Rankin and Gabor Fichtinger},
url = {http://www.ncigt.org/publications/item/view/2334
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2013a.pdf},
year = {2013},
date = {2013-03-01},
urldate = {2013-03-01},
booktitle = {6th Image Guided Therapy Workshop},
volume = {6},
pages = {34},
address = {Crystal City, VA, USA},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Imani, F; Abolmaesumi, Purang; Wu, M.; Lasso, Andras; Burdette, E. Clif; Ghoshal, G; Heffter, Tamas; Williams, E; Neubauer, P; Fichtinger, Gabor; Mousavi, Parvin
Ultrasound-guided Characterization of Interstitial Ablated Tissue Using RF Time Series: Feasibility Study. Journal Article
In: IEEE transactions on bio-medical engineering, 2013.
@article{Imani2013,
title = {Ultrasound-guided Characterization of Interstitial Ablated Tissue Using RF Time Series: Feasibility Study.},
author = {F Imani and Purang Abolmaesumi and M. Wu and Andras Lasso and E. Clif Burdette and G Ghoshal and Tamas Heffter and E Williams and P Neubauer and Gabor Fichtinger and Parvin Mousavi},
url = {http://www.ncbi.nlm.nih.gov/pubmed/23335657
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Imani2013.pdf},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {IEEE transactions on bio-medical engineering},
abstract = {<p>This paper presents the results of a feasibility study to demonstrate the application of ultrasound RF time series imaging to accurately differentiate ablated and non-ablated tissue. Methods: For 12 ex vivo and two in situ tissue samples, RF ultrasound signals are acquired prior to, and following, high intensity ultrasound ablation. Spatial and temporal features of these signals are used to characterize ablated and non-ablated tissue in a supervised-learning framework. Results: In crossvalidation evaluation, a subset of four features extracted from RF time series produce a classification accuracy of 84.5%, and an area under ROC curve of 0.91 for ex vivo data, and an accuracy of 85% for in situ data. Conclusion: Ultrasound RF time series is a promising approach for characterizing ablated tissue.</p>},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Lasso, Andras; Heffter, Tamas; Pinter, Csaba; Ungi, Tamas; Fichtinger, Gabor
Medical Image Computing and Computer-Assisted Intervention (MICCAI 2012) - Systems and Architectures for Computer Assisted Interventions, The MIDAS Journal The MIDAS Journal, Nice, France, 2012.
@conference{Lasso2012d,
title = {Implementation of the PLUS open-source toolkit for translational research of ultrasound-guided intervention systems},
author = {Andras Lasso and Tamas Heffter and Csaba Pinter and Tamas Ungi and Gabor Fichtinger},
url = {http://hdl.handle.net/10380/3367
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2012d.pdf
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2012d-slides.pdf},
year = {2012},
date = {2012-10-01},
urldate = {2012-10-01},
booktitle = {Medical Image Computing and Computer-Assisted Intervention (MICCAI 2012) - Systems and Architectures for Computer Assisted Interventions},
pages = {1-12},
publisher = {The MIDAS Journal},
address = {Nice, France},
organization = {The MIDAS Journal},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Lasso, Andras; Heffter, Tamas; Pinter, Csaba; Ungi, Tamas; Chen, Thomas K.; Boucharin, Alexis; Fichtinger, Gabor
PLUS: An open-source toolkit for ultrasound-guided intervention systems development Conference
ImNO2012 - Imaging Network Ontario Symposium, Toronto, ON, Canada, 2012.
@conference{Lasso2012a,
title = {PLUS: An open-source toolkit for ultrasound-guided intervention systems development},
author = {Andras Lasso and Tamas Heffter and Csaba Pinter and Tamas Ungi and Thomas K. Chen and Alexis Boucharin and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2012a.pdf},
year = {2012},
date = {2012-02-01},
urldate = {2012-02-01},
booktitle = {ImNO2012 - Imaging Network Ontario Symposium},
address = {Toronto, ON, Canada},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Peikari, Mohammad; Chen, Thomas K.; Lasso, Andras; Heffter, Tamas; Burdette, E. Clif; Fichtinger, Gabor
Characterization of ultrasound elevation beamwidth artifacts for prostate brachytherapy needle insertion Journal Article
In: Medical Physics, vol. 39, pp. 246-256, 2012, ISSN: 0094-2405.
@article{MPeikari2012,
title = {Characterization of ultrasound elevation beamwidth artifacts for prostate brachytherapy needle insertion},
author = {Mohammad Peikari and Thomas K. Chen and Andras Lasso and Tamas Heffter and E. Clif Burdette and Gabor Fichtinger},
url = {http://online.medphys.org/resource/1/mphya6/v39/i1/p246_s1
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/MPeikari2012.pdf},
doi = {10.1118/1.3669488},
issn = {0094-2405},
year = {2012},
date = {2012-01-01},
urldate = {2012-01-01},
journal = {Medical Physics},
volume = {39},
pages = {246-256},
abstract = {<p>Purpose: Ultrasound elevation beamwidth leads to image artefacts and uncertainties in localizing objects (such as a surgical needle) in ultrasound images. We examined the clinical significance of errors caused by elevation beamwidth artefacts and imaging parameters in needle insertion procedures. Method: Beveled prostate brachytherapy needles were inserted through all holes of a grid template under real-time transrectal ultrasound (TRUS) guidance. The needle tip position as indicated by the TRUS image was compared to their observed physical location. A new device was developed to measure the ultrasound elevation beamwidth. Result: Imaging parameters of the TRUS scanner have direct impact on the localization error ranging from 0.5 mm upto 4 mm. The smallest localization error was observed laterally close to the center of the grid template, and axially within the beam’s focal zone. Largest localization error occurs laterally around both sides of the grid template, and axially within the beam’s far field. we also found that the localization errors vary with both lateral and elevation offsets. Conclusion: We found properly adjusting the TRUS imaging settings to lower the ultrasound gain and power effectively minimized the appearance of elevation beamwidth artefacts and in turn reduced the localization errors of the needle tip.</p>},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Chen, Thomas K.; Heffter, Tamas; Lasso, Andras; Pinter, Csaba; Abolmaesumi, Purang; Burdette, E. Clif; Fichtinger, Gabor
Automated Intraoperative Calibration for Prostate Cancer Brachytherapy Journal Article
In: Medical Physics, vol. 38, pp. 6285-6299, 2011.
@article{Chen2011,
title = {Automated Intraoperative Calibration for Prostate Cancer Brachytherapy},
author = {Thomas K. Chen and Tamas Heffter and Andras Lasso and Csaba Pinter and Purang Abolmaesumi and E. Clif Burdette and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Chen2011.pdf},
doi = {10.1118/1.3651690},
year = {2011},
date = {2011-11-01},
urldate = {2011-11-01},
journal = {Medical Physics},
volume = {38},
pages = {6285-6299},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Lasso, Andras; Heffter, Tamas; Pinter, Csaba; Ungi, Tamas; Chen, Thomas K.; Boucharin, Alexis; Fichtinger, Gabor
PLUS: An open-source toolkit for developing ultrasound-guided intervention systems Conference
4th NCIGT and NIH Image Guided Therapy Workshop, vol. 4, Arlington VA, October 12-13, 2011, 2011.
@conference{Lasso2011c,
title = {PLUS: An open-source toolkit for developing ultrasound-guided intervention systems},
author = {Andras Lasso and Tamas Heffter and Csaba Pinter and Tamas Ungi and Thomas K. Chen and Alexis Boucharin and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2011c.pdf
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lasso2011c-poster.pdf},
year = {2011},
date = {2011-10-01},
urldate = {2011-10-01},
booktitle = {4th NCIGT and NIH Image Guided Therapy Workshop},
volume = {4},
pages = {103},
address = {Arlington VA, October 12-13, 2011},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Peikari, Mohammad; Chen, Thomas K.; Lasso, Andras; Heffter, Tamas; Fichtinger, Gabor
Effects of Ultrasound Section-Thickness on Brachytherapy Needle Tip Localization Error Conference
Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011), Toronto, ON, Canada, 2011.
@conference{MPeikari2011,
title = {Effects of Ultrasound Section-Thickness on Brachytherapy Needle Tip Localization Error},
author = {Mohammad Peikari and Thomas K. Chen and Andras Lasso and Tamas Heffter and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/MPeikari2011a.pdf},
year = {2011},
date = {2011-01-01},
urldate = {2011-01-01},
booktitle = {Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011)},
address = {Toronto, ON, Canada},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}