@conference {Foroughi2009,
	title = {Multi-modality fusion of CT and 3D ultrasound and tracked strain images for breast irradiation planning},
	booktitle = {SPIE Medical Imaging 2009: Ultrasonic Imaging and Signal Processing},
	volume = {7265},
	number = {72651B},
	year = {2009},
	author = {Pezhman Foroughi and Csaba Csoma and Hassan Rivaz and Gabor Fichtinger and Richard Zellars and Gregory D. Hager and Emad Boctor}
}
@article {Rivaz2008b,
	title = {Ablation monitoring with elastography: 2D in-vivo and 3D ex-vivo studies},
	journal = {Medical image computing and computer-assisted intervention (MICCAI)},
	volume = {11},
	number = {Pt 2},
	year = {2008},
	pages = {458{\textendash}466},
	publisher = {ERC for Computer Integrated Surgery, Johns Hopkins University, USA rivaz@jhu edu},
	abstract = {<p>The clinical feasibility of 2D elastography methods is hindered by the requirement that the operator avoid out-of-plane motion of the ultrasound image during palpation, and also by the lack of volumetric elastography measurements In this paper, we develop, evaluate a 3D elastography method operating on volumetric data acquired from a 3D probe Our method is based on minimizing a cost function using dynamic programming (DP) The cost function incorporates similarity of echo amplitudes, displacement continuity We present, to the best of our knowledge, the first in-vivo patient studies of monitoring liver ablation with freehand DP elastography The thermal lesion was not discernable in the B-mode image but it was clearly visible in the strain image as well as in validation CT We also present 3D strain images from thermal lesions in ex-vivo ablation Good agreement was observed between strain images, CT, gross pathology</p>
},
	keywords = {Carcinoma, Catheter Ablation, Computer-Assisted, Elasticity Imaging Techniques, Feasibility Studies, Hepatectomy, Hepatocellular, Humans, Image Interpretation, Imaging, Liver Neoplasms, methods, Surgery, surgery/ultrasonography, Three-Dimensional, Treatment Outcome},
	author = {Hassan Rivaz and Ioana Fleming and Lia Assumpcao and Gabor Fichtinger and Ulrike Hamper and Michael Choti and Gregory D. Hager and Emad Boctor}
}
@article {Rivaz2008a,
	title = {Ultrasound elastography: a dynamic programming approach},
	journal = {IEEE transactions on medical imaging},
	volume = {27},
	number = {10},
	year = {2008},
	month = {Oct},
	pages = {1373{\textendash}1377},
	publisher = {Engineering Research Center for Computer Integrated Surgery, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA},
	abstract = {<p>This paper introduces a 2-D strain imaging technique based on minimizing a cost function using dynamic programming (DP) The cost function incorporates similarity of echo amplitudes, displacement continuity Since tissue deformations are smooth, the incorporation of the smoothness into the cost function results in reduced decorrelation noise As a result, the method generates high-quality strain images of freehand palpation elastography with up to 10\% compression, showing that the method is more robust to signal decorrelation (caused by scatterer motion in high axial compression, nonaxial motions of the probe) in comparison to the standard correlation techniques The method operates in less than 1 s, is thus also potentially suitable for real time elastography</p>
},
	keywords = {Algorithms, Computer-Assisted, Elasticity Imaging Techniques, Humans, Image Enhancement, Image Interpretation, Imaging, instrumentation/methods, methods, Numerical Analysis, Phantoms, Sensitivity, Specificity},
	doi = {10 1109/TMI 2008 917243},
	url = {http://dx doi org/10 1109/TMI 2008 917243},
	author = {Hassan Rivaz and Emad Boctor and Pezhman Foroughi and Richard Zellars and Gabor Fichtinger and Gregory D. Hager}
}
@conference {Rivaz2007,
	title = {Beam Steering Approach for Speckle Characterization and Out-of-Plane Motion Estimation in Real Tissue},
	booktitle = {Procedings IEEE Ultrasonics Symposium},
	year = {2007},
	month = {10/2007},
	pages = {781{\textendash}784},
	doi = {10 1109/ULTSYM 2007 200},
	author = {Hassan Rivaz and Richard Zellars and Gregory D. Hager and Gabor Fichtinger and Emad Boctor}
}
@conference {Rivaz2007a,
	title = {A robust meshing and calibration approach for sensorless freehand 3D ultrasound},
	booktitle = {Medical Imaging 2007: Ultrasonic Imaging and Signal Processing},
	volume = {6513},
	number = {1},
	year = {2007},
	pages = {651318},
	publisher = {SPIE},
	organization = {SPIE},
	doi = {10 1117/12 712423},
	url = {http://link aip org/link/?PSI/6513/651318/1},
	author = {Hassan Rivaz and Emad Boctor and Gabor Fichtinger}
}
@conference {Rivaz2007d,
	title = {Speckle Characterization And Out-Of-Plane Motion Estimation In Tissue},
	booktitle = {Sixth International Conference on the Ultrasonic Measurement and Imaging of Tissue Elasticity},
	year = {2007},
	author = {Hassan Rivaz and Gregory D. Hager and Richard Zellars and Gabor Fichtinger and Emad Boctor}
}
@conference {Rivaz2007b,
	title = {Toward Real-Time 2d Ultrasound Elastography Using Global Optimization Of A Regularized Displacement Field},
	booktitle = {Sixth International Conference on the Ultrasonic Measurement and Imaging of Tissue Elasticity},
	year = {2007},
	author = {Hassan Rivaz and Pezhman Foroughi and Emad Boctor and Richard Zellars and Gabor Fichtinger and Gregory D. Hager}
}
@conference {Rivaz2007c,
	title = {Ultrasound Elastography: a Dynamic Programming Approach},
	booktitle = {Workshop to the 10th MICCAI Conference},
	year = {2007},
	author = {Hassan Rivaz and Pezhman Foroughi and Emad Boctor and Richard Zellars and Gabor Fichtinger and Gregory D. Hager}
}
@conference {Rivaz2006,
	title = {Ultrasound Speckle Detection Using Low Order Moments},
	booktitle = {Procedings IEEE Ultrasonics Symposium},
	year = {2006},
	month = {10/2006},
	pages = {2092{\textendash}2095},
	doi = {10 1109/ULTSYM 2006 501},
	author = {Hassan Rivaz and Emad Boctor and Gabor Fichtinger}
}
