Prof. Robert N. Rohling Profile

Prof. Robert N. Rohling

Professor at Univ of British Columbia

SPIE Involvement:

Author

Publications (45)

Proceedings Article | 1 April 2024 Presentation + Paper

Multiple photoacoustic sources localization using deep learning

Ronald de Jong, Hamid Moradi, Vincent Vousten, Robert Rohling, Septimiu Salcudean

Proceedings Volume 12932, 129320W (2024) https://doi.org/10.1117/12.3008451

KEYWORDS: Education and training, Data modeling, Gallium nitride, Image restoration, Nd:YAG lasers, Deep learning, Data acquisition, Prostate, Photoacoustic spectroscopy, Laser systems engineering

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Proceedings Article | 12 March 2024 Presentation + Paper

Ultrafast 3-D photoacoustic system development using a matrix array transducer

Hamid Moradi, Hoda Hashemi, Vincent Vousten, Robert Rohling, Septimiu Salcudean

Proceedings Volume 12842, 128420L (2024) https://doi.org/10.1117/12.3003328

KEYWORDS: Transducers, Data acquisition, Matrices, 3D image processing, Ultrasound transducers, Photoacoustic spectroscopy, 3D acquisition, Acoustics, Ultrasonography, Tissues

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SPIE Journal Paper | 8 June 2023

Automatic measurement of kidney dimensions in two-dimensional ultrasonography is comparable to expert sonographers

Rohit Singla, Cailin Ringstrom, Ricky Hu, Zoe Hu, Victoria Lessoway, Janice Reid, Christopher Nguan, Robert Rohling

JMI, Vol. 10, Issue 03, 034003, (June 2023) https://doi.org/10.1117/12.10.1117/1.JMI.10.3.034003

KEYWORDS: Kidney, Ultrasonography, Image segmentation, Diseases and disorders, Education and training, Biometrics, Statistical analysis, Neural networks, Machine learning, Magnetic resonance imaging

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Proceedings Article | 10 April 2023 Presentation + Paper

Real-time 3D ultrafast shear wave absolute vibro-elastography

Hoda Hashemi, Shahed Mohammed, Reza Zahiri Azar, Robert Rohling, Septimiu Salcudean

Proceedings Volume 12470, 124700B (2023) https://doi.org/10.1117/12.2654011

KEYWORDS: Elasticity, Tissues, Liver, Elastography

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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

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 Paper

ProjectAlign: a real-time ultrasound guidance system for spinal midline detection during epidural needle placement

Alexander Toews, Simon Massey, Vit Gunka, Victoria Lessoway, Robert Rohling

Proceedings Volume 10576, 1057630 (2018) https://doi.org/10.1117/12.2303748

KEYWORDS: Spine, Ultrasonography, Projection systems, Calibration, Detection and tracking algorithms, Projection devices, Error analysis

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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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SPIE Journal Paper | 14 February 2018

Follow the light: projector-based augmented reality intracorporeal system for laparoscopic surgery

Philip Edgcumbe, Rohit Singla, Philip Pratt, Caitlin Schneider, Christopher Nguan, Robert Rohling

JMI, Vol. 5, Issue 02, 021216, (February 2018) https://doi.org/10.1117/12.10.1117/1.JMI.5.2.021216

KEYWORDS: Tumors, Surgery, Ultrasonography, Tissues, Kidney, Laparoscopy, Autoregressive models, Projection systems, Augmented reality, 3D modeling

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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 | 13 March 2017 Presentation + Paper

Speed of sound estimation for dual-stage virtual source ultrasound beamforming using point scatterers

Manyou Ma, Robert Rohling, Lutz Lampe

Proceedings Volume 10139, 101390Z (2017) https://doi.org/10.1117/12.2248309

KEYWORDS: Image resolution, Ultrasonography, Biomedical ultrasonography, Biomedical optics, Synthetic aperture radar, Data analysis, Beam analyzers, Tissues, Image quality, Medical imaging, Chemical elements, Reflectors, Optical simulations, Image compression

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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 | 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 | 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 | 18 March 2016 Paper

Automatic detection of a hand-held needle in ultrasound via phased-based analysis of the tremor motion

Parmida Beigi, Septimiu Salcudean, Robert Rohling, Gary Ng

Proceedings Volume 9786, 97860I (2016) https://doi.org/10.1117/12.2217073

KEYWORDS: Ultrasonography, Motion analysis, Motion detection, Wavelets, Optical tracking, Visibility, Spatial frequencies, Phase measurement, Image segmentation, Hough transforms, In vivo imaging, Motion estimation, Binary data

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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 | 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 | 18 March 2015 Paper

Needle detection in ultrasound using the spectral properties of the displacement field: a feasibility study

Parmida Beigi, Tim Salcudean, Robert Rohling, Victoria Lessoway, Gary Ng

Proceedings Volume 9415, 94150U (2015) https://doi.org/10.1117/12.2081723

KEYWORDS: Ultrasonography, Tissues, Visibility, In vivo imaging, Motion estimation, Transducers, Image segmentation, Tissue optics, Motion analysis, Doppler effect

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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 | 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

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 | 20 March 2014 Paper

Vibro-elastography: direct FEM inversion of the shear wave equation without the local homogeneity assumption

Mohammad Honarvar, Septimiu Salcudean, Robert Rohling

Proceedings Volume 9040, 904003 (2014) https://doi.org/10.1117/12.2043682

KEYWORDS: Ultrasonography, Tissues, Finite element methods, Inverse problems, Elastography, Magnetic resonance imaging, 3D modeling, Spherical lenses, Medical imaging, Motion measurement

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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

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

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

Needle localization using a moving stylet/catheter in ultrasound-guided regional anesthesia: a feasibility study

Parmida Beigi, Robert Rohling

Proceedings Volume 9036, 90362Q (2014) https://doi.org/10.1117/12.2043957

KEYWORDS: Tissues, Visibility, Ultrasonography, Image segmentation, Motion detection, Transducers, Hough transforms, Detection and tracking algorithms, Ultrasonics, 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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SPIE Journal Paper | 19 August 2013

Statistical unit root test for edge detection in ultrasound images of vessels and cysts

Mehdi Moradi, S. Sara Mahdavi, Julian Guerrero, Robert Rohling, Septimiu Salcudean

JEI, Vol. 22, Issue 03, 033013, (August 2013) https://doi.org/10.1117/12.10.1117/1.JEI.22.3.033013

KEYWORDS: Image segmentation, Ultrasonography, Edge detection, Detection and tracking algorithms, Sensors, Breast, Autoregressive models, Veins, Statistical modeling, Image processing algorithms and systems

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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 | 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

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

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 | 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 | 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 | 2 March 2011 Paper

Alignment and calibration of high frequency ultrasound (HFUS) and optical coherence tomography (OCT) 1D transducers using a dual wedge-tri step phantom

N. Afsham, K. Chan, L. Pan, S. Tang, R. Rohling

Proceedings Volume 7964, 796428 (2011) https://doi.org/10.1117/12.878182

KEYWORDS: Transducers, Optical coherence tomography, Calibration, Image segmentation, Ultrasonography, Visualization, Feature extraction, Optical alignment, 3D modeling, Image fusion

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Proceedings Article | 2 March 2011 Paper

Single camera closed-form real-time needle trajectory tracking for ultrasound

Mohammad Najafi, Robert Rohling

Proceedings Volume 7964, 79641F (2011) https://doi.org/10.1117/12.877798

KEYWORDS: Cameras, Ultrasonography, Calibration, Transducers, Optical tracking, Imaging systems, Visualization, Stereoscopic cameras, Image processing, Magnetic tracking

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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 | 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 | 10 March 2008 Paper

Adaptive spatial compounding for improving ultrasound images of the epidural space on human subjects

Denis Tran, King-Wei Hor, Allaudin Kamani, Vickie Lessoway, Robert Rohling

Proceedings Volume 6920, 69200I (2008) https://doi.org/10.1117/12.769216

KEYWORDS: Ultrasonography, Speckle, Bone, Image registration, Human subjects, Signal to noise ratio, Reflectors, Algorithm development, Tissues, Image processing

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Proceedings Article | 12 March 2007 Paper

Adaptive spatial compounding for improving ultrasound images of the epidural space

Denis Tran, Allaudin Kamani, Vickie Lessoway, Robert Rohling

Proceedings Volume 6513, 65130W (2007) https://doi.org/10.1117/12.704225

KEYWORDS: Ultrasonography, Edge detection, Speckle, Bone, Image registration, Tissues, Sensors, Refraction, Visibility, Image quality

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Proceedings Article | 10 March 2006 Paper

3D ultrasound-based patient positioning for radiotherapy

Michael Wang, Robert Rohling, Neculai Archip, Brenda Clark

Proceedings Volume 6141, 61411K (2006) https://doi.org/10.1117/12.653225

KEYWORDS: Ultrasonography, Computed tomography, Image registration, Radiotherapy, Calibration, 3D acquisition, Acquisition tracking and pointing, Skin, Laser marking, Data acquisition

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Proceedings Article | 28 April 2004 Paper

Real-time spatial compounding with warping

Adrian Groves, Robert Rohling

Proceedings Volume 5373, (2004) https://doi.org/10.1117/12.533848

KEYWORDS: Ultrasonography, Image quality, Image registration, Tissues, Computer simulations, Image processing, Speckle pattern, Image quality standards, Refraction, Raster graphics

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Proceedings Article | 19 May 2003 Paper

iScout: an intelligent scout for navigating large image sets

Adam Weathermon, Robert Rohling

Proceedings Volume 5033, (2003) https://doi.org/10.1117/12.480462

KEYWORDS: Picture Archiving and Communication System, Computed tomography, Medical imaging, Image storage, Magnetic resonance imaging, 3D image processing, Local area networks, Ultrasonography, Navigation systems, Image transmission

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Proceedings Article | 18 April 2000 Paper

New spatial localizer based on fiber optics with applications in 3D ultrasound imaging

Niko Pagoulatos, Robert Rohling, Warren Edwards, Yongmin Kim

Proceedings Volume 3976, (2000) https://doi.org/10.1117/12.383088

KEYWORDS: Sensors, 3D image processing, Fiber optics sensors, Position sensors, Ultrasonography, 3D acquisition, 3D metrology, 3D modeling, Fiber optics, Computing systems

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Showing 5 of 45 publications

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