Ehasn Dehghan
Dehghan, Ehsan; Le, Yi; Lee, Junghoon; Song, Danny Y; Fichtinger, Gabor; Prince, Jerry L.
CT AND MRI FUSION FOR POSTIMPLANT PROSTATE BRACHYTHERAPY EVALUATION Conference
IEEE Int. Symp on Biomedical Imaging, 2016.
@conference{Dehghan2016,
title = {CT AND MRI FUSION FOR POSTIMPLANT PROSTATE BRACHYTHERAPY EVALUATION},
author = {Ehsan Dehghan and Yi Le and Junghoon Lee and Danny Y Song and Gabor Fichtinger and Jerry L. Prince},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Ehsan_ISBI_2016.pdf},
year = {2016},
date = {2016-04-01},
urldate = {2016-04-01},
booktitle = {IEEE Int. Symp on Biomedical Imaging},
pages = {625-628},
abstract = {<p>Postoperative evaluation of prostate brachytherapy is typically<br />
performed using CT, which does not have sufficient<br />
soft tissue contrast for accurate anatomy delineation. MR-CT<br />
fusion enables more accurate localization of both anatomy<br />
and implanted radioactive seeds, and hence, improves the<br />
accuracy of postoperative dosimetry. We propose a method<br />
for automatic registration of MR and CT images without a<br />
need for manual initialization. Our registration method employs<br />
a point-to-volume registration scheme during which<br />
localized seeds in the CT images, produced by commercial<br />
treatment planning systems as part of the standard of care,<br />
are rigidly registered to preprocessed MRI images. We tested<br />
our algorithm on ten patient data sets and achieved an overall<br />
registration error of 1.6 ± 0.8mm with a running time of less<br />
than 20s. With high registration accuracy and computational<br />
speed, and no need for manual intervention, our method has<br />
the potential to be employed in clinical applications.</p>},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
performed using CT, which does not have sufficient<br />
soft tissue contrast for accurate anatomy delineation. MR-CT<br />
fusion enables more accurate localization of both anatomy<br />
and implanted radioactive seeds, and hence, improves the<br />
accuracy of postoperative dosimetry. We propose a method<br />
for automatic registration of MR and CT images without a<br />
need for manual initialization. Our registration method employs<br />
a point-to-volume registration scheme during which<br />
localized seeds in the CT images, produced by commercial<br />
treatment planning systems as part of the standard of care,<br />
are rigidly registered to preprocessed MRI images. We tested<br />
our algorithm on ten patient data sets and achieved an overall<br />
registration error of 1.6 ± 0.8mm with a running time of less<br />
than 20s. With high registration accuracy and computational<br />
speed, and no need for manual intervention, our method has<br />
the potential to be employed in clinical applications.</p>
Li, Yi; Burdette, E. Clif; Prince, Jerry L.; Fichtinger, Gabor; Lee, Junghoon; Song, Danny Y; Kuo, Nathanael; Dehghan, Ehsan; Degeut, Anton; Mian, Omar
An image-guidance system for dynamic dose calculation in prostate brachytherapy using ultrasound and fluoroscopy Journal Article
In: Medical Physics, vol. 41, 2014.
@article{Kuo2014,
title = {An image-guidance system for dynamic dose calculation in prostate brachytherapy using ultrasound and fluoroscopy},
author = {Yi Li and E. Clif Burdette and Jerry L. Prince and Gabor Fichtinger and Junghoon Lee and Danny Y Song and Nathanael Kuo and Ehsan Dehghan and Anton Degeut and Omar Mian},
url = {http://dx.doi.org/10.1118/1.4893761
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Kuo_MedPhys2014.pdf},
year = {2014},
date = {2014-08-01},
urldate = {2014-08-01},
journal = {Medical Physics},
volume = {41},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Filippo, Chiara Amat San; Fichtinger, Gabor; Morris, William J.; Salcudean, Septimiu E.; Dehghan, Ehsan; Fallavollita, Pascal
Declustering n-Connected Components for Segmentation of Iodine Implants in C-Arm Fluoroscopy Images Conference
Information Processing in Computer-Assisted Interventions (IPCAI), Springer Springer, Heidelberg, Germany, June 26, 2013, 2013.
@conference{Filippo2013,
title = {Declustering n-Connected Components for Segmentation of Iodine Implants in C-Arm Fluoroscopy Images},
author = {Chiara Amat San Filippo and Gabor Fichtinger and William J. Morris and Septimiu E. Salcudean and Ehsan Dehghan and Pascal Fallavollita},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Filippo2013.pdf},
year = {2013},
date = {2013-06-01},
urldate = {2013-06-01},
booktitle = {Information Processing in Computer-Assisted Interventions (IPCAI)},
pages = {101-110},
publisher = {Springer},
address = {Heidelberg, Germany, June 26, 2013},
organization = {Springer},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Moradi, Mehdi; Mahdavi, S. S.; Dehghan, Ehsan; Lobo, Julio R.; Deshmukh, S.; Morris, William J.; Fichtinger, Gabor; Salcudean, Septimiu E.
Seed localization in ultrasound and registration to C-arm fluoroscopy using matched needle tracks for prostate brachytherapy. Journal Article
In: IEEE Transactions on Bio-Medical Engineering, vol. 59, pp. 2558 - 2567, 2012.
@article{Moradi2012,
title = {Seed localization in ultrasound and registration to C-arm fluoroscopy using matched needle tracks for prostate brachytherapy.},
author = {Mehdi Moradi and S. S. Mahdavi and Ehsan Dehghan and Julio R. Lobo and S. Deshmukh and William J. Morris and Gabor Fichtinger and Septimiu E. Salcudean},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Moradi2012.pdf},
doi = {10.1109/TBME.2012.2206808},
year = {2012},
date = {2012-06-01},
urldate = {2012-06-01},
journal = {IEEE Transactions on Bio-Medical Engineering},
volume = {59},
pages = {2558 - 2567},
abstract = {<p>We propose a novel fiducial-free approach for the registration of C-arm fluoroscopy to 3D ultrasound images of prostate brachytherapy implants to enable dosimetry. The approach involves the reliable detection of a subset of radioactive seeds from 3D ultrasound, and the use of needle tracks in both ultrasound and fluoroscopy for registration. Seed detection in ultrasound is achieved through template matching in 3D radio frequency ultrasound signals, followed by thresholding and spatial filtering. The resulting subset of seeds is registered to the complete reconstruction of the brachytherapy implant from multiple C-arm fluoroscopy views. To compensate for the deformation caused by the ultrasound probe, simulated warping is applied to the seed cloud from fluoroscopy. The magnitude of the applied warping is optimized within the registration process. The registration is performed in two stages. First, the needle track projections from fluoroscopy and ultrasound are matched. Only the seeds in the matched needles are then used as fiducials for point-based registration. We report results from a physical phantom with a realistic implant (average postregistration seed distance of 1.6±1.2 mm) and from five clinical patient datasets (average error: 2.8±1.5 mm over 128 detected seeds). We conclude that it is feasible to use RF ultrasound data, template matching, and spatial filtering to detect a reliable subset of brachytherapy seeds from ultrasound to enable registration to fluoroscopy for dosimetry.</p>},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Lobo, Julio R.; Moradi, Mehdi; Chng, N.; Dehghan, Ehsan; Morris, William J.; Fichtinger, Gabor; Salcudean, Septimiu E.
Use of Needle Track Detection to Quantify the Displacement of Stranded Seeds Following Prostate Brachytherapy Journal Article
In: IEEE Transactions on Medical Imaging, vol. 31, pp. 738 - 748, 2012, ISSN: 1558-254X.
@article{Lobo2012,
title = {Use of Needle Track Detection to Quantify the Displacement of Stranded Seeds Following Prostate Brachytherapy},
author = {Julio R. Lobo and Mehdi Moradi and N. Chng and Ehsan Dehghan and William J. Morris and Gabor Fichtinger and Septimiu E. Salcudean},
doi = {10.1109/TMI.2011.2178254},
issn = {1558-254X},
year = {2012},
date = {2012-03-01},
urldate = {2012-03-01},
journal = {IEEE Transactions on Medical Imaging},
volume = {31},
pages = {738 - 748},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dehghan, Ehsan; Lee, Junghoon; Fallavollita, Pascal; Kuo, Nathanael; Degeut, Anton; Le, Yi; Burdette, E. Clif; Song, Danny Y; Prince, Jerry L.; Fichtinger, Gabor
Ultrasound–fluoroscopy registration for prostate brachytherapy dosimetry Journal Article
In: Medical Image Analysis, vol. 16, pp. 1347-1358, 2012.
@article{Dehghan2012a,
title = {Ultrasound–fluoroscopy registration for prostate brachytherapy dosimetry},
author = {Ehsan Dehghan and Junghoon Lee and Pascal Fallavollita and Nathanael Kuo and Anton Degeut and Yi Le and E. Clif Burdette and Danny Y Song and Jerry L. Prince and Gabor Fichtinger},
url = {http://www.sciencedirect.com/science/article/pii/S1361841512000813
https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Dehghan_etal_US_Fluoro_Reg.pdf},
doi = {http://dx.doi.org/10.1016/j.media.2012.06.001},
year = {2012},
date = {2012-01-01},
urldate = {2012-01-01},
journal = {Medical Image Analysis},
volume = {16},
pages = {1347-1358},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Moult, Eric; Fichtinger, Gabor; Morris, William J.; Salcudean, Septimiu E.; Dehghan, Ehsan; Fallavollita, Pascal
Segmentation of iodine brachytherapy implants in fluoroscopy Journal Article
In: International Journal of Computer Assisted Radiology and Surgery, 2012.
@article{Moult2012b,
title = {Segmentation of iodine brachytherapy implants in fluoroscopy},
author = {Eric Moult and Gabor Fichtinger and William J. Morris and Septimiu E. Salcudean and Ehsan Dehghan and Pascal Fallavollita},
url = {http://www.springerlink.com/content/kmn31823g053wj55/},
doi = {10.1007/s11548-012-0679-4},
year = {2012},
date = {2012-01-01},
urldate = {2012-01-01},
journal = {International Journal of Computer Assisted Radiology and Surgery},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dehghan, Ehsan; Jain, Ameet K.; Moradi, Mehdi; Wen, Xu; Morris, William J.; Salcudean, Septimiu E.; Fichtinger, Gabor
Brachytherapy Seed Reconstruction with Joint-Encoded C-Arm Single-Axis Rotation and Motion Compensation Journal Article
In: Medical Image Analysis, vol. 15, pp. 760 – 771, 2011.
@article{Dehghan2011a,
title = {Brachytherapy Seed Reconstruction with Joint-Encoded C-Arm Single-Axis Rotation and Motion Compensation},
author = {Ehsan Dehghan and Ameet K. Jain and Mehdi Moradi and Xu Wen and William J. Morris and Septimiu E. Salcudean and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Dehghan_etal_US_Fluoro_Reg.pdf},
doi = {10.1016/j.media.2011.05.017},
year = {2011},
date = {2011-10-01},
urldate = {2011-10-01},
journal = {Medical Image Analysis},
volume = {15},
pages = {760 – 771},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dehghan, Ehsan; Moradi, Mehdi; Wen, Xu; French, Danny; Lobo, Julio R.; Morris, William J.; Salcudean, Septimiu E.; Fichtinger, Gabor
Prostate implant reconstruction from C-arm images with motion-compensated tomosynthesis Journal Article
In: Medical Physics, vol. 38, no. 10, pp. 5290 – 5302, 2011.
@article{Dehghan2011c,
title = {Prostate implant reconstruction from C-arm images with motion-compensated tomosynthesis},
author = {Ehsan Dehghan and Mehdi Moradi and Xu Wen and Danny French and Julio R. Lobo and William J. Morris and Septimiu E. Salcudean and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Dehghan_etal_MedPhys2011.pdf},
year = {2011},
date = {2011-10-01},
urldate = {2011-10-01},
journal = {Medical Physics},
volume = {38},
number = {10},
pages = {5290 – 5302},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dehghan, Ehsan; Lee, Junghoon; Fallavollita, Pascal; Kuo, Nathanael; Degeut, Anton; Burdette, E. Clif; Song, Danny Y; Prince, Jerry L.; Fichtinger, Gabor
Point-to-Volume Registration of Prostate Implants to Ultrasound Conference
Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011), Toronto, ON, Canada, 2011.
@conference{Dehghan2011b,
title = {Point-to-Volume Registration of Prostate Implants to Ultrasound},
author = {Ehsan Dehghan and Junghoon Lee and Pascal Fallavollita and Nathanael Kuo and Anton Degeut and E. Clif Burdette and Danny Y Song and Jerry L. Prince and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Dehghan_MICCAI11.pdf},
year = {2011},
date = {2011-09-01},
urldate = {2011-09-01},
booktitle = {Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011)},
pages = {615 - 622},
address = {Toronto, ON, Canada},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Lobo, Julio R.; Moradi, Mehdi; Chng, N.; Dehghan, Ehsan; Morris, William J.; Fichtinger, Gabor; Salcudean, Septimiu E.
Quantifying stranded implant displacement following prostate brachytherapy Conference
Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011), vol. 6891, Toronto, ON, Canada, 2011.
@conference{Lobo2011a,
title = {Quantifying stranded implant displacement following prostate brachytherapy},
author = {Julio R. Lobo and Mehdi Moradi and N. Chng and Ehsan Dehghan and William J. Morris and Gabor Fichtinger and Septimiu E. Salcudean},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Lobo2011a.pdf},
year = {2011},
date = {2011-09-01},
urldate = {2011-09-01},
booktitle = {Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011)},
volume = {6891},
pages = {307-314},
address = {Toronto, ON, Canada},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Moradi, Mehdi; Mahdavi, S. S.; Deshmukh, S.; Lobo, Julio R.; Dehghan, Ehsan; Fichtinger, Gabor; Morris, William J.; Salcudean, Septimiu E.
Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011), vol. 6891, Toronto, ON, Canada, 2011.
@conference{Moradi2011a,
title = {Towards intra-operative prostate brachytherapy dosimetry based on partial seed localization in ultrasound and registration to C-arm fluoroscopy},
author = {Mehdi Moradi and S. S. Mahdavi and S. Deshmukh and Julio R. Lobo and Ehsan Dehghan and Gabor Fichtinger and William J. Morris and Septimiu E. Salcudean},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Moradi2011a.pdf},
year = {2011},
date = {2011-09-01},
urldate = {2011-09-01},
booktitle = {Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011)},
volume = {6891},
pages = {291-298},
address = {Toronto, ON, Canada},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Dehghan, Ehsan; Lee, Junghoon; Moradi, Mehdi; Wen, Xu; Fichtinger, Gabor; Salcudean, Septimiu E.
Prostate Brachytherapy Seed Reconstruction using C-Arm Rotation Measurement and Motion Compensation Conference
Medical Image Computing and Computer-Assisted Intervention (MICCAI) 2010, Springer Springer, Beijing, China, 2010, ISBN: 978-3-642-15704-2.
@conference{Dehghan2010a,
title = {Prostate Brachytherapy Seed Reconstruction using C-Arm Rotation Measurement and Motion Compensation},
author = {Ehsan Dehghan and Junghoon Lee and Mehdi Moradi and Xu Wen and Gabor Fichtinger and Septimiu E. Salcudean},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Dehghan2010a.pdf},
doi = {http://dx.doi.org/10.1007/978-3-642-15705-9_35},
isbn = {978-3-642-15704-2},
year = {2010},
date = {2010-01-01},
urldate = {2010-01-01},
booktitle = {Medical Image Computing and Computer-Assisted Intervention (MICCAI) 2010},
pages = {283-290},
publisher = {Springer},
address = {Beijing, China},
organization = {Springer},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Gordon, Lauren; Dehghan, Ehsan; Salcudean, Septimiu E.; Fichtinger, Gabor
Reconstruction of Needle Tracts from Fluoroscopy in Prostate Brachytherapy Conference
22nd International Conference of the Society for Medical Innovation and Technology (SMIT), Trondheim, Norway, September 2-4, 2010, 2010.
@conference{Gordon2010a,
title = {Reconstruction of Needle Tracts from Fluoroscopy in Prostate Brachytherapy},
author = {Lauren Gordon and Ehsan Dehghan and Septimiu E. Salcudean and Gabor Fichtinger},
url = {https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Gordon2010a.pdf},
year = {2010},
date = {2010-01-01},
urldate = {2010-01-01},
booktitle = {22nd International Conference of the Society for Medical Innovation and Technology (SMIT)},
address = {Trondheim, Norway, September 2-4, 2010},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}