Ryan Kon
Graduate student (Masters)
CISST Center
Johns Hopkins University
Kon, Ryan; Jain, Ameet K.; Fichtinger, Gabor
Hidden seed reconstruction from C-arm images in brachytherapy Conference
Procedings 3rd IEEE International Symposium on Biomedical Imaging: Nano to Macro, 2006.
@conference{Kon2006,
title = {Hidden seed reconstruction from C-arm images in brachytherapy},
author = {Ryan Kon and Ameet K. Jain and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Kon2006.pdf},
doi = {10 1109/ISBI 2006 1624969},
year = {2006},
date = {2006-04-01},
urldate = {2006-04-01},
booktitle = {Procedings 3rd IEEE International Symposium on Biomedical Imaging: Nano to Macro},
pages = {526–529},
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Jain, Ameet K.; Kon, Ryan; Zhou, Yu; Fichtinger, Gabor
C-arm calibration-is it really necessary? Journal Article
In: Medical image computing and computer-assisted intervention (MICCAI), vol. 8, no. Pt 1, pp. 639–646, 2005.
@article{Jain2005,
title = {C-arm calibration-is it really necessary?},
author = {Ameet K. Jain and Ryan Kon and Yu Zhou and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Jain2005c.pdf},
year = {2005},
date = {2005-01-01},
urldate = {2005-01-01},
journal = {Medical image computing and computer-assisted intervention (MICCAI)},
volume = {8},
number = {Pt 1},
pages = {639–646},
abstract = {<p>C-arm fluoroscopy is modelled as a perspective projection, the parameters of which are estimated through a calibration procedure It has been universally accepted that precise intra-procedural calibration is a prerequisite for accurate quantitative C-arm fluoroscopy guidance Calibration, however, significantly adds to system complexity, which is a major impediment to clinical practice We challenge the status quo by questioning the assumption that precise intra-procedural calibration is really necessary We derived theoretical bounds for the sensitivity of 3D measurements to mis-calibration Experimental results corroborated the theory in that mis-calibration in the focal spot by as much as 50 mm still allows for tracking with an accuracy of 0 5 mm in translation, 0 65 degrees in rotation, and such mis-calibration does not impose any additional error on the reconstruction of small objects</p>},
keywords = {},
pubstate = {published},
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<p>C-arm fluoroscopy is modelled as a perspective projection, the parameters of which are estimated through a calibration procedure It has been universally accepted that precise intra-procedural calibration is a prerequisite for accurate quantitative C-arm fluoroscopy guidance Calibration, however, significantly adds to system complexity, which is a major impediment to clinical practice We challenge the status quo by questioning the assumption that precise intra-procedural calibration is really necessary We derived theoretical bounds for the sensitivity of 3D measurements to mis-calibration Experimental results corroborated the theory in that mis-calibration in the focal spot by as much as 50 mm still allows for tracking with an accuracy of 0 5 mm in translation, 0 65 degrees in rotation, and such mis-calibration does not impose any additional error on the reconstruction of small objects</p>
Kon, Ryan; Leven, Joshua; Kothapalli, Kishore; Boctor, Emad; Fichtinger, Gabor; Hager, Gregory D.; Taylor, Russell H.
CIS-UltraCal: an open-source ultrasound calibration toolkit Conference
Medical Imaging 2005: Ultrasonic Imaging and Signal Processing, vol. 5750, no. 1, SPIE SPIE, 2005.
@conference{Kon2005,
title = {CIS-UltraCal: an open-source ultrasound calibration toolkit},
author = {Ryan Kon and Joshua Leven and Kishore Kothapalli and Emad Boctor and Gabor Fichtinger and Gregory D. Hager and Russell H. Taylor},
url = {http://link aip org/link/?PSI/5750/516/1
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Kon2005.pdf},
doi = {10 1117/12 596929},
year = {2005},
date = {2005-01-01},
urldate = {2005-01-01},
booktitle = {Medical Imaging 2005: Ultrasonic Imaging and Signal Processing},
volume = {5750},
number = {1},
pages = {516-523},
publisher = {SPIE},
organization = {SPIE},
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Kon, Ryan; Leven, Joshua; Kothapalli, Kishore; Boctor, Emad; Fichtinger, Gabor; Hager, Greg; Taylor, Russell H
CIS-UltraCal: An open-source ultrasound calibration toolkit Journal Article
In: vol. 5750, pp. 516-523, 2005.
@article{fichtinger2005d,
title = {CIS-UltraCal: An open-source ultrasound calibration toolkit},
author = {Ryan Kon and Joshua Leven and Kishore Kothapalli and Emad Boctor and Gabor Fichtinger and Greg Hager and Russell H Taylor},
url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/5750/0000/CIS-UltraCal-an-open-source-ultrasound-calibration-toolkit/10.1117/12.596929.short},
year = {2005},
date = {2005-01-01},
volume = {5750},
pages = {516-523},
publisher = {SPIE},
abstract = {We present an open-source MATLAB toolkit for ultrasound calibration. It has a convenient graphical user interface which sits on top of an extensive API. Calibration using three different phantoms is explicitly supported: the cross-wire phantom, the single-wall phantom, and the Hopkins phantom. Image processing of the Hopkins phantom is automated by making use of techniques from binary morphology, radon transform and RANSAC. Numerous calibration and termination parameters are exposed. It is also modular, allowing one to apply the system to original phantoms by writing a minimum of new code.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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We present an open-source MATLAB toolkit for ultrasound calibration. It has a convenient graphical user interface which sits on top of an extensive API. Calibration using three different phantoms is explicitly supported: the cross-wire phantom, the single-wall phantom, and the Hopkins phantom. Image processing of the Hopkins phantom is automated by making use of techniques from binary morphology, radon transform and RANSAC. Numerous calibration and termination parameters are exposed. It is also modular, allowing one to apply the system to original phantoms by writing a minimum of new code.
Jain, Ameet; Kon, Ryan; Zhou, Yu; Fichtinger, Gabor
C-arm calibration–is it really necessary? Journal Article
In: pp. 639-646, 2005.
@article{fichtinger2005g,
title = {C-arm calibration–is it really necessary?},
author = {Ameet Jain and Ryan Kon and Yu Zhou and Gabor Fichtinger},
url = {https://link.springer.com/chapter/10.1007/11566465_79},
year = {2005},
date = {2005-01-01},
pages = {639-646},
publisher = {Springer Berlin Heidelberg},
abstract = {C-arm fluoroscopy is modelled as a perspective projection, the parameters of which are estimated through a calibration procedure. It has been universally accepted that precise intra-procedural calibration is a prerequisite for accurate quantitative C-arm fluoroscopy guidance. Calibration, however, significantly adds to system complexity, which is a major impediment to clinical practice. We challenge the status quo by questioning the assumption that precise intra-procedural calibration is really necessary. We derived theoretical bounds for the sensitivity of 3D measurements to mis-calibration. Experimental results corroborated the theory in that mis-calibration in the focal spot by as much as 50 mm still allows for tracking with an accuracy of 0.5 mm in translation and 0.65 o in rotation, and such mis-calibration does not impose any additional error on the reconstruction of small objects.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
C-arm fluoroscopy is modelled as a perspective projection, the parameters of which are estimated through a calibration procedure. It has been universally accepted that precise intra-procedural calibration is a prerequisite for accurate quantitative C-arm fluoroscopy guidance. Calibration, however, significantly adds to system complexity, which is a major impediment to clinical practice. We challenge the status quo by questioning the assumption that precise intra-procedural calibration is really necessary. We derived theoretical bounds for the sensitivity of 3D measurements to mis-calibration. Experimental results corroborated the theory in that mis-calibration in the focal spot by as much as 50 mm still allows for tracking with an accuracy of 0.5 mm in translation and 0.65 o in rotation, and such mis-calibration does not impose any additional error on the reconstruction of small objects.