Dr. Purang Abolmaesumi Profile

Dr. Purang Abolmaesumi

Professor at Univ of British Columbia

SPIE Involvement:

Conference Program Committee | Author

Publications (76)

Proceedings Article | 10 April 2024 Presentation + Paper

Near-infrared imaging for intraoperative evaluation of allograft viability and function in human kidney transplantation

Arshdeep Khurana, Christopher Nguan, Kourosh Afshar, Purang Abolmaesumi, Babak Shadgan

Proceedings Volume 12817, 128170F (2024) https://doi.org/10.1117/12.3003340

KEYWORDS: Kidney, Tissues, Oxygenation, Transplantation, Hemodynamics, Surgery, Biopsy, Adipose tissue, Oxygen, Near infrared spectroscopy

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End-stage renal disease (ESRD) is a serious medical condition characterized by an irreversible decline in kidney function. The optimal treatment for ESRD is kidney transplantation, providing improved quality and quantity of life and lower mortality rates compared to other treatments. While there exists a vast constellation of variables that contribute to the ultimate success of a kidney transplant, timely diagnosis of allograft dysfunction and its underlying etiology is crucial in informing appropriate treatment plans and improving graft survival rates. The monitoring and diagnosis of early postoperative allograft function may involve regular bloodwork for renal function testing, percutaneous kidney biopsy, and intermittent transabdominal ultrasonography, all of which have inherent limitations and risks. Objective intraoperative assessment of graft quality and perfusion characteristics lacks reliable and safe techniques in kidney transplantation. We propose applying a novel optical technique based on near-infrared imaging (NIRI) for intraoperative interrogation of allograft metabolic function. The objectives of this study were to examine the feasibility and functionality of a non-contact, non-invasive, handheld NIRI device for intraoperative monitoring of graft hemodynamics and oxygenation during transplantation. Intraoperative NIRI assessment of the kidney parenchyma tissue oxygen saturation (StO₂) was performed for 25 transplants. Images of the allograft were taken at the back table after preparation, in-situ before perfusion, at the earliest convenience after reperfusion, and then at 1, 2, 3, 4, 5, 10, 15, 20, and 25 minutes following reperfusion. A final image was taken before closure. The kidney parenchyma tissue was digitally segmented and the average parenchymal StO₂ was calculated at each time point. All patients showed low StO₂ in the images taken before reperfusion, with an increase in StO₂ seen after clamp removal. Our study demonstrated the feasibility and functionality of a handheld NIRI device for intraoperative monitoring of kidney graft hemodynamics and oxygenation during transplantation. For future studies, clinical measures, and additional hemodynamic parameters, such as the velocity in reaching max StO₂, will be compared for donor kidneys of varying quality.

Proceedings Article | 29 March 2024 Presentation + Paper

Benchmarking image transformers for prostate cancer detection from ultrasound data

Mohamed Harmanani, Paul F. Wilson, Fahimeh Fooladgar, Amoon Jamzad, Mahdi Gilany, Minh Nguyen Nhat To, Brian Wodlinger, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 12928, 1292815 (2024) https://doi.org/10.1117/12.3006049

KEYWORDS: Transformers, Ultrasonography, Biopsy, Cancer detection, Prostate cancer

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PURPOSE: Deep learning methods for classifying prostate cancer (PCa) in ultrasound images typically employ convolutional neural networks (CNN) to detect cancer in small regions of interest (ROI) along a needle trace region. However, this approach suffers from weak labelling, since the ground-truth histopathology labels do not describe the properties of individual ROIs. Recently, multi-scale approaches have sought to mitigate this issue by combining the context awareness of transformers with a convolutional feature extractor to detect cancer from multiple ROIs using multiple-instance learning (MIL). In this work, we present a detailed study of several image transformer architectures for both ROI-scale and multi-scale classification, and a comparison of the performance of CNNs and transformers for ultrasound-based prostate cancer classification. We also design a novel multi-objective learning strategy that combines both ROI and core predictions to further mitigate label noise. METHODS: We use a dataset of 6607 prostate biopsy cores extracted from 693 patients at 5 distinct clinical centers. We evaluate 3 image transformers on ROI-scale cancer classification, then use the strongest model to tune a multi-scale classifier with MIL, wherein another transformer is fine-tuned on top of the existing model’s features. We train our MIL models using our novel multi-objective learning strategy and compare our results to existing baselines. RESULTS: We find that for both ROI-scale and multi-scale PCa detection, image transformer backbones lag behind their CNN counterparts. This deficit in performance is even more noticeable for larger models. When using multi-objective learning, we are able to improve the performance of MIL models, with a 77.9% AUROC, a sensitivity of 75.9%, and a specificity of 66.3%, a considerable improvement over the baseline. CONCLUSION: We conclude that convolutional networks are better suited for modelling sparse datasets of prostate ultrasounds, producing more robust features than their transformer counterparts in PCa detection. Multi-scale methods remain the best architecture for this task, with multi-objective learning presenting an effective way to improve performance.

Proceedings Article | 4 April 2022 Presentation + Paper

Multi-task deep learning for segmentation and landmark detection in obstetric sonography

Michael Allan, Mohammad Jafari, Nathan Woudenberg, Oron Frenkel, Darra Murphy, Tracee Wee, Rob D'Ortenzio, Yong Wu, James Roberts, Naoya Shatani, Ang Nan Gu, Samira Sojoudi, Purang Abolmaesumi

Proceedings Volume 12034, 120340R (2022) https://doi.org/10.1117/12.2611163

KEYWORDS: Uterus, Ultrasonography, Image segmentation, Fetus

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Proceedings Article | 4 April 2022 Presentation + Paper

A light-weight deep video network: towards robust assessment of ejection fraction on mobile devices

Xinyu Kang, Mohammad Jafari, M. Mahdi Kazemi, Christina Luong, Teresa Tsang, Purang Abolmaesumi

Proceedings Volume 12034, 120341I (2022) https://doi.org/10.1117/12.2611176

KEYWORDS: Heart, Echocardiography, Machine learning

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Proceedings Article | 4 April 2022 Presentation + Paper

An efficient deep landmark detection network for PLAX EF estimation using sparse annotations

Jamie Alexis D. Goco, Mohammad Jafari, Christina Luong, Teresa Tsang, Purang Abolmaesumi

Proceedings Volume 12034, 120340N (2022) https://doi.org/10.1117/12.2611239

KEYWORDS: Video, Systems modeling, Data modeling, Heart, Ultrasonography, Error analysis

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SPIE Journal Paper | 28 September 2021 Open Access

Investigation of photoacoustic tomography reconstruction with a limited view from linear array

Min Ai, Jiayi Cheng, Davood Karimi, Septimiu Salcudean, Robert Rohling, Purang Abolmaesumi, Shuo Tang

JBO, Vol. 26, Issue 09, 096009, (September 2021) https://doi.org/10.1117/12.10.1117/1.JBO.26.9.096009

KEYWORDS: Transducers, Acquisition tracking and pointing, Reconstruction algorithms, Photoacoustic tomography, Image restoration, Imaging arrays, Signal to noise ratio, Imaging systems, Calibration, Photography

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Proceedings Article | 8 March 2019 Presentation + Paper

EpiGuide 2D: visibility assessment of a novel multi-channel out-of-plane needle guide for 2D point-of-care ultrasound

Simon Honigmann, Yi Cheng Zhu, Rohit Singla, Purang Abolmaesumi, Anthony Chau, Robert Rohling

Proceedings Volume 10951, 109510K (2019) https://doi.org/10.1117/12.2513165

KEYWORDS: Medical devices, Ultrasonography, Tissues, Visualization, Visibility, Transducers, In vivo imaging, Point-of-care devices, Spine, Statistical analysis

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Proceedings Article | 8 March 2019 Presentation + Paper

Temporal enhanced ultrasound and shear wave elastography for tissue classification in cancer interventions: an experimental evaluation

Si Jia Li, Jack Barnes, Purang Abolmaesumi, Hans-Peter Loock, Parvin Mousavi

Proceedings Volume 10951, 109510V (2019) https://doi.org/10.1117/12.2514103

KEYWORDS: Tissues, Ultrasonography, Elastography, Cancer, Scattering, Wave propagation, Fourier transforms, Acoustics

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Proceedings Article | 8 March 2019 Presentation + Paper

Designing lightweight deep learning models for echocardiography view classification

Hooman Vaseli, Zhibin Liao, Amir Abdi, Hany Girgis, Delaram Behnami, Christina Luong, Fatemeh Taheri Dezaki, Neeraj Dhungel, Robert Rohling, Ken Gin, Purang Abolmaesumi, Teresa Tsang

Proceedings Volume 10951, 109510F (2019) https://doi.org/10.1117/12.2512913

KEYWORDS: Echocardiography, Network architectures, Ultrasonography, Heart, Data modeling, Convolutional neural networks

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Proceedings Article | 13 March 2018 Presentation + Paper

3D tissue mimicking biophantoms for ultrasound imaging: bioprinting and image analysis

Shekoofeh Azizi, Sharareh Bayat, Ajay Rajaram, Emran M. A. Anas, Tamer Mohamed, Konrad Walus, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 10576, 105761T (2018) https://doi.org/10.1117/12.2293930

KEYWORDS: Tissues, Ultrasonography, Cancer, Printing, Image analysis, 3D image processing, 3D printing, Microfluidics, Liver cancer

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Proceedings Article | 19 February 2018 Presentation + Paper

Transurethral illumination probe design for deep photoacoustic imaging of prostate

Min Ai, Tim Salcudean, Robert Rohling, Purang Abolmaesumi, Shuo Tang

Proceedings Volume 10494, 104940C (2018) https://doi.org/10.1117/12.2291164

KEYWORDS: Prostate, Mirrors, Tissue optics, Transducers, Light sources, Etching, Signal attenuation, Photoacoustic imaging, Tissues

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Proceedings Article | 13 March 2017 Presentation + Paper

Tissue mimicking simulations for temporal enhanced ultrasound-based tissue typing

Sharareh Bayat, Farhad Imani, Carlos Gerardo, Guy Nir, Shekoofeh Azizi, Pingkun Yan, Amir Tahmasebi, Storey Wilson, Kenneth Iczkowski, M. Scott Lucia, Larry Goldenberg, Septimiu Salcudean, Parvin Mousavi, Purang Abolmaesumi

Proceedings Volume 10139, 101390D (2017) https://doi.org/10.1117/12.2255540

KEYWORDS: Tissues, Ultrasonography, Finite element methods, In vivo imaging, Prostate, Breast cancer, Image segmentation, Prostate cancer, Physics, Computer simulations, Cancer, Pathology, Data acquisition

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Proceedings Article | 13 March 2017 Presentation + Paper

Phase-factor based beamforming to improve the visualization of hyper-echoic targets

Bo Zhuang, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 10139, 1013910 (2017) https://doi.org/10.1117/12.2255590

KEYWORDS: Signal processing, Image processing, Ultrasonography, Visualization, Bone, Statistical analysis, Image analysis, Natural surfaces, Tissues, Reflection, Data centers

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Proceedings Article | 3 March 2017 Paper

Classification of clinical significance of MRI prostate findings using 3D convolutional neural networks

Alireza Mehrtash, Alireza Sedghi, Mohsen Ghafoorian, Mehdi Taghipour, Clare Tempany, William Wells, Tina Kapur, Parvin Mousavi, Purang Abolmaesumi, Andriy Fedorov

Proceedings Volume 10134, 101342A (2017) https://doi.org/10.1117/12.2277123

KEYWORDS: Convolutional neural networks, Principal component analysis, Magnetic resonance imaging, Prostate, Computer aided diagnosis and therapy, Data modeling, Prostate cancer, Diffusion weighted imaging, 3D modeling, Tissues

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Proceedings Article | 3 March 2017 Presentation + Paper

Identification and tracking of vertebrae in ultrasound using deep networks with unsupervised feature learning

Jorden Hetherington, Mehran Pesteie, Victoria Lessoway, Purang Abolmaesumi, Robert Rohling

Proceedings Volume 10135, 101350K (2017) https://doi.org/10.1117/12.2252641

KEYWORDS: Ultrasonography, Machine learning, Spine, Image classification, Bone, Data acquisition, Transducers, Computer programming, Neurons, Detection and tracking algorithms

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Proceedings Article | 3 March 2017 Presentation + Paper

Models of temporal enhanced ultrasound data for prostate cancer diagnosis: the impact of time-series order

Layan Nahlawi, Caroline Goncalves, Farhad Imani, Mena Gaed, Jose Gomez, Madeleine Moussa, Eli Gibson, Aaron Fenster, Aaron Ward, Purang Abolmaesumi, Parvin Mousavi, Hagit Shatkay

Proceedings Volume 10135, 101351D (2017) https://doi.org/10.1117/12.2255798

KEYWORDS: Computational modeling, Stochastic processes, Time series analysis, Expectation maximization algorithms, Tumor growth modeling, Data modeling, Tissues, Ultrasonography, Prostate cancer, Performance modeling, Prostate, Biopsy, Statistical modeling

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Proceedings Article | 3 March 2017 Presentation + Paper

DeepInfer: open-source deep learning deployment toolkit for image-guided therapy

Alireza Mehrtash, Mehran Pesteie, Jorden Hetherington, Peter Behringer, Tina Kapur, William Wells, Robert Rohling, Andriy Fedorov, Purang Abolmaesumi

Proceedings Volume 10135, 101351K (2017) https://doi.org/10.1117/12.2256011

KEYWORDS: Data modeling, 3D modeling, Machine learning, Medical imaging, Neural networks, 3D image processing, Biomedical optics, Biomedical engineering, Software development, Prostate, Visual process modeling, Image segmentation, Visualization, Solid modeling, Ultrasonography

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Proceedings Article | 24 February 2017 Presentation + Paper

Automatic quality assessment of apical four-chamber echocardiograms using deep convolutional neural networks

Amir Abdi, Christina Luong, Teresa Tsang, Gregory Allan, Saman Nouranian, John Jue, Dale Hawley, Sarah Fleming, Ken Gin, Jody Swift, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 10133, 101330S (2017) https://doi.org/10.1117/12.2254585

KEYWORDS: Convolutional neural networks, Echocardiography, Image quality, Transducers, Image acquisition, Data modeling, Heart, Network architectures, Statistical modeling, Performance modeling

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Proceedings Article | 24 March 2016 Paper

Fusion of multi-parametric MRI and temporal ultrasound for characterization of prostate cancer: in vivo feasibility study

Farhad Imani, Sahar Ghavidel, Purang Abolmaesumi, Siavash Khallaghi, Eli Gibson, Amir Khojaste, Mena Gaed, Madeleine Moussa, Jose Gomez, Cesare Romagnoli, Derek Cool, Matthew Bastian-Jordan, Zahra Kassam, D. Robert Siemens, Michael Leveridge, Silvia Chang, Aaron Fenster, Aaron Ward, Parvin Mousavi

Proceedings Volume 9785, 97851K (2016) https://doi.org/10.1117/12.2217205

KEYWORDS: Ultrasonography, Magnetic resonance imaging, Prostate cancer, Principal component analysis, In vivo imaging, Cancer, Image fusion, Image registration, Receivers, Tissues, Data modeling, Tumor growth modeling

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Proceedings Article | 18 March 2016 Paper

Classification of prostate cancer grade using temporal ultrasound: in vivo feasibility study

Sahar Ghavidel, Farhad Imani, Siavash Khallaghi, Eli Gibson, Amir Khojaste, Mena Gaed, Madeleine Moussa, Jose Gomez, D. Robert Siemens, Michael Leveridge, Silvia Chang, Aaron Fenster, Aaron Ward, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 9786, 97860K (2016) https://doi.org/10.1117/12.2216922

KEYWORDS: Ultrasonography, Cancer, Tissues, Prostate cancer, In vivo imaging, Feature selection, Data modeling, Machine learning, Receivers

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Proceedings Article | 15 March 2016 Paper

High energy laser pulse coupling in a multimode fiber for photoacoustic tomography

Min Ai, Weihang Shu, Tim Salcudean, Robert Rohling, Purang Abolmaesumi, Shuo Tang

Proceedings Volume 9708, 97084H (2016) https://doi.org/10.1117/12.2213080

KEYWORDS: Photoacoustic tomography, Multimode fibers, Fiber lasers, Fiber couplers, Pulsed laser operation, Laser energy, Acoustics, Imaging systems, In vivo imaging, Waveguides, Acquisition tracking and pointing, Optical parametric oscillators, Energy efficiency, Data acquisition

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Proceedings Article | 20 March 2015 Paper

Characterization of aggressive prostate cancer using ultrasound RF time series

Amir Khojaste, Farhad Imani, Mehdi Moradi, David Berman, D. Robert Siemens, Eric Sauerberi, Alexander Boag, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 9414, 94141A (2015) https://doi.org/10.1117/12.2082663

KEYWORDS: Prostate cancer, Ultrasonography, Cancer, Tissues, Prostate, Biopsy, Doppler effect, Tumors, Oncology, Image processing

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Proceedings Article | 18 March 2015 Paper

Data fusion for planning target volume and isodose prediction in prostate brachytherapy

Saman Nouranian, Mahdi Ramezani, S. Sara Mahdavi, Ingrid Spadinger, William Morris, Septimiu Salcudean, Purang Abolmaesumi

Proceedings Volume 9415, 94151I (2015) https://doi.org/10.1117/12.2081055

KEYWORDS: Prostate, Data modeling, Independent component analysis, Process modeling, Binary data, Error analysis, Data fusion, Gold, Cancer, Reconstruction algorithms

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Proceedings Article | 18 March 2015 Paper

Deep learning for automatic localization, identification, and segmentation of vertebral bodies in volumetric MR images

Amin Suzani, Abtin Rasoulian, Alexander Seitel, Sidney Fels, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 9415, 941514 (2015) https://doi.org/10.1117/12.2081542

KEYWORDS: Image segmentation, Magnetic resonance imaging, Spine, 3D modeling, Statistical analysis, Feature extraction, Statistical modeling, X-ray computed tomography, Computed tomography, Magnetism

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Proceedings Article | 18 March 2015 Paper

Scaphoid fracture fixation: localization of bones through statistical model to ultrasound registration

Emran Mohammad Abu Anas, Abtin Rasoulian, Paul St. John, David Pichora, Parvin Mousavi, Victoria Lessoway, Alexander Seitel, Ilker Hacihaliloglu, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 9415, 94150P (2015) https://doi.org/10.1117/12.2081578

KEYWORDS: Bone, 3D modeling, Image registration, Statistical analysis, Ultrasonography, Statistical modeling, Clouds, Surgery, Navigation systems, Injuries

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Proceedings Article | 11 March 2015 Paper

Image registration for limited-view photoacoustic imaging using two linear array transducers

Weihang Shu, Min Ai, Tim Salcudean, Robert Rohling, Purang Abolmaesumi, Shuo Tang

Proceedings Volume 9323, 932348 (2015) https://doi.org/10.1117/12.2077740

KEYWORDS: Transducers, Calibration, Photoacoustic imaging, Image processing, Photoacoustic tomography, Image registration, Photoacoustic spectroscopy, Acoustics, Reconstruction algorithms, Ultrasonography

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Proceedings Article | 21 March 2014 Paper

Joint source based analysis of multiple brain structures in studying major depressive disorder

Mahdi Ramezani, Abtin Rasoulian, Tom Hollenstein, Kate Harkness, Ingrid Johnsrude, Purang Abolmaesumi

Proceedings Volume 9034, 90341P (2014) https://doi.org/10.1117/12.2042275

KEYWORDS: Brain, Tissues, Magnetic resonance imaging, Shape analysis, Associative arrays, Brain mapping, Modulation, Neuroimaging, Feature extraction, Ferroelectric LCDs

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Proceedings Article | 21 March 2014 Paper

A statistical shape+pose model for segmentation of wrist CT images

Emran Mohammad Abu Anas, Abtin Rasoulian, Paul St. John, David Pichora, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 9034, 90340T (2014) https://doi.org/10.1117/12.2043092

KEYWORDS: Bone, Image segmentation, 3D modeling, Statistical analysis, Computed tomography, Statistical modeling, Motion models, Image registration, Shape analysis, Clouds

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Proceedings Article | 12 March 2014 Paper

Automatic labeling and segmentation of vertebrae in CT images

Abtin Rasoulian, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 9036, 903623 (2014) https://doi.org/10.1117/12.2043256

KEYWORDS: Image segmentation, Computed tomography, Statistical modeling, Image registration, X-ray computed tomography, Spine, Feature extraction, Error analysis, Image resolution, MATLAB

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Proceedings Article | 12 March 2014 Paper

Semi-automatic segmentation of vertebral bodies in volumetric MR images using a statistical shape+pose model

Amin Suzani, Abtin Rasoulian, Sidney Fels, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 9036, 90360P (2014) https://doi.org/10.1117/12.2043847

KEYWORDS: Image segmentation, Magnetic resonance imaging, Statistical modeling, 3D modeling, Computed tomography, Spine, 3D image processing, Tissues, Statistical analysis, Magnetism

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Proceedings Article | 12 March 2014 Paper

A global CT to US registration of the lumbar spine

Simrin Nagpal, Ilker Hacihaliloglu, Tamas Ungi, Abtin Rasoulian, Jill Osborn, Victoria Lessoway, Robert Rohling, Daniel Borschneck, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 9036, 90362O (2014) https://doi.org/10.1117/12.2043934

KEYWORDS: Spine, Bone, Image registration, Computed tomography, Ultrasonography, Transducers, Data acquisition, Visualization, Global Positioning System, Sensors

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Proceedings Article | 12 March 2014 Paper

Fast prostate segmentation for brachytherapy based on joint fusion of images and labels

Saman Nouranian, Mahdi Ramezani, S. Sara Mahdavi, Ingrid Spadinger, William Morris, Septimiu Salcudean, Purang Abolmaesumi

Proceedings Volume 9036, 90361A (2014) https://doi.org/10.1117/12.2042692

KEYWORDS: Image segmentation, Prostate, Ultrasonography, Independent component analysis, Image fusion, Distance measurement, Cancer, Binary data, Image processing, Principal component analysis

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Proceedings Article | 12 March 2014 Paper

Towards enabling ultrasound guidance in cervical cancer high-dose-rate brachytherapy

Adrian Wong, Samira Sojoudia, Marc Gaudet, Wan Wan Yap, Silvia Chang, Purang Abolmaesumi, Christina Aquino-Parsons, Mehdi Moradi

Proceedings Volume 9036, 90361Q (2014) https://doi.org/10.1117/12.2044235

KEYWORDS: Magnetic resonance imaging, Ultrasonography, Uterus, Tumors, Image registration, Cervical cancer, 3D modeling, 3D image processing, Tissues, Cancer

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Proceedings Article | 12 March 2014 Paper

Motion and deformation compensation for freehand prostate biopsies

Siavash Khallaghi, Saman Nouranian, Samira Sojoudi, Hussam Ashab, Lindsay Machan, Silvia Chang, Peter Black, Martin Gleave, Larry Goldenberg, Purang Abolmaesumi

Proceedings Volume 9036, 903620 (2014) https://doi.org/10.1117/12.2043135

KEYWORDS: Prostate, Biopsy, Image registration, Rigid registration, 3D acquisition, 3D image processing, Ultrasonography, Target acquisition, Data acquisition, Motion models

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Proceedings Article | 12 March 2014 Paper

SimITK: model driven engineering for medical imaging

Melissa Trezise, David Gobbi, James Cordy, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 9036, 903622 (2014) https://doi.org/10.1117/12.2043197

KEYWORDS: Simulink, Image registration, Medical imaging, Process modeling, Image filtering, MATLAB, Computer programming, Image segmentation, Algorithm development, Image processing

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Proceedings Article | 3 March 2014 Paper

Differentiating fatty and non-fatty tissue using photoacoustic imaging

Leo Pan, Robert Rohling, Purang Abolmaesumi, Septimiu Salcudean, Shuo Tang

Proceedings Volume 8943, 894354 (2014) https://doi.org/10.1117/12.2041047

KEYWORDS: Tissues, Photoacoustic spectroscopy, Liver, Tissue optics, Photoacoustic imaging, Temperature metrology, Ultrasonography, Transducers, Acoustics, Absorption

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Proceedings Article | 13 March 2013 Paper

Multi-object statistical analysis of late adolescent depression

Mahdi Ramezani, Abtin Rasoulian, Purang Abolmaesumi, Tom Hollenstein, Ingrid Johnsrude, Kate Harkness

Proceedings Volume 8669, 86690D (2013) https://doi.org/10.1117/12.2007013

KEYWORDS: Brain, Shape analysis, Statistical analysis, Image segmentation, Control systems, Magnetic resonance imaging, Amygdala, Data modeling, Neuroimaging, Brain mapping

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Proceedings Article | 12 March 2013 Paper

A statistical multi-vertebrae shape+pose model for segmentation of CT images

Abtin Rasoulian, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 8671, 86710P (2013) https://doi.org/10.1117/12.2007448

KEYWORDS: Image segmentation, Computed tomography, Statistical modeling, Spine, Image registration, Data modeling, Image processing, Expectation maximization algorithms, Error analysis, Data acquisition

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Proceedings Article | 12 March 2013 Paper

Multi-atlas-based automatic 3D segmentation for prostate brachytherapy in transrectal ultrasound images

Saman Nouranian, S. Sara Mahdavi, Ingrid Spadinger, William Morris, S. Salcudean, P. Abolmaesumi

Proceedings Volume 8671, 86710O (2013) https://doi.org/10.1117/12.2007974

KEYWORDS: Image segmentation, Prostate, Detection and tracking algorithms, Image registration, Image processing algorithms and systems, Expectation maximization algorithms, Ultrasonography, 3D image processing, Gold, Prostate cancer

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Proceedings Article | 4 March 2013 Paper

Improving photoacoustic imaging contrast of brachytherapy seeds

Leo Pan, Ali Baghani, Robert Rohling, Purang Abolmaesumi, Septimiu Salcudean, Shuo Tang

Proceedings Volume 8581, 85814B (2013) https://doi.org/10.1117/12.2005787

KEYWORDS: Ultrasonography, Photoacoustic imaging, Signal to noise ratio, Tissues, Prostate, Absorption, Coating, Prostate cancer, Acoustics, Imaging systems

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Proceedings Article | 25 February 2012 Paper

GPU accelerated implementation of ultrasound radio-frequency time series analysis

Jonathan Chung, Mohammad Daoud, Farhad Imani, Parvin Mousavi, Purang Abolmaesumi

Proceedings Volume 8320, 83201I (2012) https://doi.org/10.1117/12.911737

KEYWORDS: Ultrasonography, Tissues, MATLAB, Visualization, Time series analysis, Imaging systems, Image processing, Computer engineering, Cancer, Computing systems

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Proceedings Article | 25 February 2012 Paper

Out-of-plane motion estimation based on a Rician-Inverse Gaussian model of RF ultrasound signals: speckle tracking without fully developed speckle

N. Afsham, M. Najafi, P. Abolmaesumi, R. Rohling

Proceedings Volume 8320, 832017 (2012) https://doi.org/10.1117/12.911710

KEYWORDS: Motion estimation, Speckle, Ultrasonography, Motion models, Tissues, Stochastic processes, Statistical analysis, Point spread functions, Imaging systems, Calibration

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Proceedings Article | 17 February 2012 Paper

Single wall closed-form differential ultrasound calibration

Mohammad Najafi, Narges Afsham, Purang Abolmaesumi, Robert Rohling

Proceedings Volume 8316, 83162A (2012) https://doi.org/10.1117/12.911459

KEYWORDS: Calibration, Ultrasonography, Transducers, 3D image processing, Condition numbers, Image analysis, Image segmentation, Imaging systems, Aluminum, Computer engineering

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Proceedings Article | 17 February 2012 Paper

Probabilistic registration of an unbiased statistical shape model to ultrasound images of the spine

Abtin Rasoulian, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 8316, 83161P (2012) https://doi.org/10.1117/12.911742

KEYWORDS: Ultrasonography, Image registration, Spine, Statistical modeling, 3D modeling, Bone, Data modeling, Human subjects, Image segmentation, In vivo imaging

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Proceedings Article | 25 March 2011 Paper

Computer-aided tissue characterization using ultrasound-induced thermal effects: analytical formulation and in-vitro animal study

Mohammad Daoud, Parvin Mousavi, Farhad Imani, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 7968, 79680G (2011) https://doi.org/10.1117/12.877754

KEYWORDS: Tissues, Ultrasonography, Phase shifts, Breast, Acoustics, Liver, Time series analysis, Temperature metrology, Thermal effects, Transducers

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Proceedings Article | 25 March 2011 Paper

Tissue classification using depth-dependent ultrasound time series analysis: in-vitro animal study

Farhad Imani, Mohammad Daoud, Mehdi Moradi, Purang Abolmaesumi, Parvin Mousavi

Proceedings Volume 7968, 79680F (2011) https://doi.org/10.1117/12.877845

KEYWORDS: Tissues, Liver, Breast, Ultrasonography, Feature extraction, In vitro testing, Time series analysis, Transducers, Fractal analysis, Scanners

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Proceedings Article | 2 March 2011 Paper

GPU accelerated registration of a statistical shape model of the lumbar spine to 3D ultrasound images

Siavash Khallaghi, Purang Abolmaesumi, Ren Hui Gong, Elvis Chen, Sean Gill, Jonathan Boisvert, David Pichora, Dan Borschneck, Gabor Fichtinger, Parvin Mousavi

Proceedings Volume 7964, 79642W (2011) https://doi.org/10.1117/12.878377

KEYWORDS: Image registration, Ultrasonography, 3D modeling, Statistical modeling, Spine, Computed tomography, 3D image processing, Graphics processing units, Error analysis, Bone

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Proceedings Article | 2 March 2011 Paper

Phantom validation for ultrasound to statistical shape model registration of human pelvis

Sahar Ghanavati, Parvin Mousavi, Gabor Fichtinger, Purang Abolmaesumi

Proceedings Volume 7964, 79642U (2011) https://doi.org/10.1117/12.876998

KEYWORDS: Image registration, Bone, Error analysis, Statistical modeling, Image segmentation, Ultrasonography, Tissues, Computer simulations, 3D modeling, Navigation systems

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Proceedings Article | 2 March 2011 Paper

Automatic C-arm pose estimation via 2D/3D hybrid registration of a radiographic fiducial

E. Moult, E. Burdette, D. Y. Song, P. Abolmaesumi, G. Fichtinger, P. Fallavollita

Proceedings Volume 7964, 79642S (2011) https://doi.org/10.1117/12.877713

KEYWORDS: Image segmentation, Image registration, Image filtering, Prostate, Image processing algorithms and systems, Reconstruction algorithms, Fluoroscopy, Algorithm development, 3D image processing, Cancer

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Proceedings Article | 2 March 2011 Paper

SimITK: rapid ITK prototyping using the Simulink visual programming environment

A. W. Dickinson, P. Mousavi, D. Gobbi, P. Abolmaesumi

Proceedings Volume 7964, 796438 (2011) https://doi.org/10.1117/12.878254

KEYWORDS: Simulink, Visualization, C++, Computer programming, MATLAB, Image registration, Magnetic resonance imaging, Prototyping, Image segmentation, Medical imaging

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Proceedings Article | 24 February 2010 Paper

Registration of ultrasound to CT angiography of kidneys: a porcine phantom study

Jing Xiang, Sean Gill, Christopher Nguan, Purang Abolmaesumi, Robert Rohling

Proceedings Volume 7625, 762518 (2010) https://doi.org/10.1117/12.844594

KEYWORDS: Kidney, Image registration, Computed tomography, Ultrasonography, Tissues, Angiography, Gold, Arteries, Surgery, Computer simulations

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Proceedings Article | 24 February 2010 Paper

Multi-slice to volume registration of ultrasound data to a statistical atlas of human pelvis

Sahar Ghanavati, Parvin Mousavi, Gabor Fichtinger, Pezhman Foroughi, Purang Abolmaesumi

Proceedings Volume 7625, 76250O (2010) https://doi.org/10.1117/12.844080

KEYWORDS: Ultrasonography, Image registration, Bone, Image segmentation, Computed tomography, Error analysis, Surgery, X-ray computed tomography, Statistical modeling, Image processing

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Proceedings Article | 24 February 2010 Paper

Group-wise feature-based registration of CT and ultrasound images of spine

Abtin Rasoulian, Parvin Mousavi, Mehdi Hedjazi Moghari, Pezhman Foroughi, Purang Abolmaesumi

Proceedings Volume 7625, 76250R (2010) https://doi.org/10.1117/12.844598

KEYWORDS: Ultrasonography, Image registration, Spine, Image segmentation, Computed tomography, Bone, Motion models, Rigid registration, X-ray computed tomography, Computer programming

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Proceedings Article | 24 February 2010 Paper

Localization of brachytherapy seeds in ultrasound by registration to fluoroscopy

P. Fallavollita, Z. KarimAghaloo, E. C. Burdette, D. Song, P. Abolmaesumi, G. Fichtinger

Proceedings Volume 7625, 762519 (2010) https://doi.org/10.1117/12.844015

KEYWORDS: Fluoroscopy, Prostate, Image registration, Ultrasonography, Image filtering, Denoising, Visualization, Clouds, Image segmentation, 3D image reconstruction

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Proceedings Article | 24 February 2010 Paper

Ultrasound guided spine needle insertion

Elvis C. Chen, Parvin Mousavi, Sean Gill, Gabor Fichtinger, Purang Abolmaesumi

Proceedings Volume 7625, 762538 (2010) https://doi.org/10.1117/12.843716

KEYWORDS: Navigation systems, Spine, Computed tomography, Transducers, Image registration, Ultrasonography, Sensors, Visualization, Tissues, X-ray computed tomography

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Proceedings Article | 27 March 2009 Paper

Probabilistic pairwise Markov models: application to prostate cancer detection

James Monaco, John Tomaszewski, Michael Feldman, Mehdi Moradi, Parvin Mousavi, Alexander Boag, Chris Davidson, Purang Abolmaesumi, Anant Madabhushi

Proceedings Volume 7259, 725903 (2009) https://doi.org/10.1117/12.812462

KEYWORDS: Image segmentation, Solid modeling, Tumor growth modeling, CAD systems, Computer aided design, Magnetorheological finishing, Prostate, Prostate cancer, Computer aided diagnosis and therapy, Chromium

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Proceedings Article | 14 March 2009 Paper

Fusion of electromagnetic tracking with speckle-tracked 3D freehand ultrasound using an unscented Kalman filter

Andrew Lang, Parvin Mousavi, Gabor Fichtinger, Purang Abolmaesumi

Proceedings Volume 7265, 72651A (2009) https://doi.org/10.1117/12.813879

KEYWORDS: Speckle, Optical tracking, Ultrasonography, Calibration, Filtering (signal processing), Sensors, Sensor fusion, Electromagnetism, 3D modeling, 3D image processing

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Proceedings Article | 14 March 2009 Paper

Tissue typing with ultrasound RF time series: phantom studies

Mehdi Moradi, Parvin Mousavi, Robert Rohling, Purang Abolmaesumi

Proceedings Volume 7265, 726516 (2009) https://doi.org/10.1117/12.811693

KEYWORDS: Tissues, Ultrasonography, Particles, Control systems, Feature extraction, Glasses, Prostate, Prostate cancer, Data acquisition, Tumors

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Proceedings Article | 13 March 2009 Paper

Group-wise registration of ultrasound to CT images of human vertebrae

Sean Gill, Parvin Mousavi, Gabor Fichtinger, David Pichora, Purang Abolmaesumi

Proceedings Volume 7261, 72611O (2009) https://doi.org/10.1117/12.813776

KEYWORDS: Image registration, Computed tomography, Tissues, Bone, Spine, Computer simulations, Ultrasonography, X-ray computed tomography, Optical simulations, Natural surfaces

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Proceedings Article | 13 March 2009 Paper

Intraoperative localization of brachytherapy implants using intensity-based registration

Z. KarimAghaloo, P. Abolmaesumi, N. Ahmidi, T. Chen, D. Gobbi, G. Fichtinger

Proceedings Volume 7261, 726139 (2009) https://doi.org/10.1117/12.812447

KEYWORDS: Image registration, Fluoroscopy, Prostate, Ultrasonography, Binary data, Denoising, X-ray computed tomography, Image filtering, Data modeling, X-rays

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Proceedings Article | 13 March 2009 Paper

Reduction of multi-fragment fractures of the distal radius using atlas-based 2D/3D registration

Ren Hui Gong, James Stewart, Purang Abolmaesumi

Proceedings Volume 7261, 726137 (2009) https://doi.org/10.1117/12.811638

KEYWORDS: X-rays, X-ray imaging, Image segmentation, Bone, Transform theory, 3D modeling, 3D image processing, X-ray computed tomography, Surgery, Data modeling

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Proceedings Article | 28 February 2009 Paper

Automated detection of prostate cancer using wavelet transform features of ultrasound RF time series

Mohammad Aboofazeli, Purang Abolmaesumi, Mehdi Moradi, Eric Sauerbrei, Robert Siemens, Alexander Boag, Parvin Mousavi

Proceedings Volume 7260, 72603J (2009) https://doi.org/10.1117/12.813831

KEYWORDS: Ultrasonography, Tissues, Prostate cancer, Prostate, Fractal analysis, Wavelets, Cancer, Wavelet transforms, Biopsy, Tumors

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Proceedings Article | 28 February 2009 Paper

Quantification of inter-subject variability in human brain: a validation framework for probabilistic maps

Amir Tahmasebi, Purang Abolmaesumi, Conor Wild, Ingrid Johnsrude

Proceedings Volume 7262, 726218 (2009) https://doi.org/10.1117/12.811214

KEYWORDS: Brain mapping, Brain, Image registration, Diagnostics, Magnetic resonance imaging, Neuroimaging, Tissues, Image segmentation, Data analysis, Auditory cortex

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Proceedings Article | 31 March 2008 Paper

A real-time ultrasound calibration system with automatic accuracy control and incorporation of ultrasound section thickness

Thomas Kuiran Chen, Adrian Thurston, Mehdi Moghari, Randy Ellis, Purang Abolmaesumi

Proceedings Volume 6918, 69182A (2008) https://doi.org/10.1117/12.770393

KEYWORDS: Calibration, Image segmentation, Transducers, Ultrasonography, Crystals, Laser crystals, Control systems, Automatic control, Precision calibration, Bridges

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Proceedings Article | 17 March 2008 Paper

Maximum likelihood estimation of the distribution of target registration error

Mehdi Hedjazi Moghari, Purang Abolmaesumi

Proceedings Volume 6918, 69180I (2008) https://doi.org/10.1117/12.768868

KEYWORDS: Detection and tracking algorithms, Numerical simulations, Computer simulations, Image registration, Error analysis, Monte Carlo methods, Data modeling, Algorithm development, Matrices, Medical imaging

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Proceedings Article | 17 March 2008 Paper

2D/3D registration with the CMA-ES method

Ren Hui Gong, Purang Abolmaesumi

Proceedings Volume 6918, 69181M (2008) https://doi.org/10.1117/12.770331

KEYWORDS: Image registration, Computed tomography, Volume rendering, Computer simulations, Error analysis, Gold, Radiography, Bone, Filtering (signal processing), 3D image processing

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Proceedings Article | 21 March 2007 Paper

A novel graphical user interface for ultrasound-guided shoulder arthroscopic surgery

K. Tyryshkin, P. Mousavi, M. Beek, D. Pichora, P. Abolmaesumi

Proceedings Volume 6509, 65090Z (2007) https://doi.org/10.1117/12.708484

KEYWORDS: Ultrasonography, Calibration, Image registration, 3D modeling, Image segmentation, Surgery, Human-machine interfaces, Optical tracking, Cameras, Bone

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Proceedings Article | 12 March 2007 Paper

A new approach to analysis of RF ultrasound echo signals for tissue characterization: animal studies

Mehdi Moradi, Parvin Mousavi, Philip Isotalo, David Siemens, Eric Sauerbrei, Purang Abolmaesumi

Proceedings Volume 6513, 65130P (2007) https://doi.org/10.1117/12.708630

KEYWORDS: Tissues, Ultrasonography, Liver, Fractal analysis, Neural networks, Breast, Network architectures, Feature extraction, Signal processing, Neurons

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Proceedings Article | 12 March 2007 Paper

Accuracy estimation in freehand ultrasound probe calibration

Mehdi Moghari, Thomas Chen, Purang Abolmaesumi

Proceedings Volume 6513, 651313 (2007) https://doi.org/10.1117/12.708537

KEYWORDS: Calibration, Ultrasonography, Image segmentation, Remote sensing, Error analysis, 3D image processing, Image processing, Statistical analysis, Filtering (signal processing), Algorithm development

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Proceedings Article | 16 March 2006 Paper

Freehand ultrasound calibration using the unscented Kalman filter

Mehdi Hedjazi Moghari, Thomas Kuiran Chen, Purang Abolmaesumi

Proceedings Volume 6147, 61470X (2006) https://doi.org/10.1117/12.654144

KEYWORDS: Calibration, Ultrasonography, 3D image processing, Filtering (signal processing), Statistical analysis, Optimization (mathematics), Optical tracking, Error analysis, Detection and tracking algorithms, Image segmentation

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Proceedings Article | 10 March 2006 Paper

A novel ultrasound-guided shoulder arthroscopic surgery

K. Tyryshkin, P. Mousavi, M. Beek, T. Chen, D. Pichora, P. Abolmaesumi

Proceedings Volume 6141, 61412L (2006) https://doi.org/10.1117/12.652145

KEYWORDS: Image registration, Ultrasonography, 3D modeling, Surgery, Image segmentation, Computed tomography, Navigation systems, Bone, Cameras, 3D image processing

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Proceedings Article | 10 March 2006 Paper

Deformable registration using scale space keypoints

Mehdi Moradi, Purang Abolmaesoumi, Parvin Mousavi

Proceedings Volume 6144, 61442G (2006) https://doi.org/10.1117/12.652132

KEYWORDS: Image registration, Ultrasonography, Magnetic resonance imaging, Medical imaging, Brain, Image segmentation, Neuroimaging, Image processing, Tissues, Signal to noise ratio

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Proceedings Article | 10 March 2006 Paper

Percutaneous scaphoid pinning using ultrasound guidance

Maarten Beek, Purang Abolmaesumi, Thomas Chen, Richard Sellens, David Pichora

Proceedings Volume 6141, 61410P (2006) https://doi.org/10.1117/12.652122

KEYWORDS: 3D modeling, Image segmentation, Ultrasonography, Surgery, Computed tomography, Cameras, Image registration, Bone, 3D image processing, Calibration

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Proceedings Article | 12 April 2005 Paper

A mutual-information-based registration algorithm for ultrasound-guided computer-assisted orthopaedic surgery

Thomas Chen, Purang Abolmaesumi

Proceedings Volume 5744, (2005) https://doi.org/10.1117/12.595549

KEYWORDS: Image registration, Surgery, Bone, Optical tracking, 3D image processing, Databases, Image segmentation, 3D modeling, Calibration, Ultrasonography

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Proceedings Article | 12 May 2004 Paper

Ultrasound image segmentation using an interacting multiple-model probabilistic data association filter

Purang Abolmaesumi, Mohammad Sirouspour

Proceedings Volume 5370, (2004) https://doi.org/10.1117/12.533706

KEYWORDS: Image segmentation, Image processing algorithms and systems, Ultrasonography, Bone, Motion models, Computed tomography, Medical imaging, Data modeling, Breast, Prostate

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Proceedings Article | 26 September 1997 Paper

New neural-networks-based 3D object recognition system

Purang Abolmaesumi, M. Jahed

Proceedings Volume 3208, (1997) https://doi.org/10.1117/12.290302

KEYWORDS: Object recognition, Databases, Machine vision, Computer vision technology, Optical spheres, 3D vision

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Showing 5 of 76 publications

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