Mr. Joel M. Ramjist Profile

Joel M. Ramjist

Researcher / Project Coordinator at Toronto Metropolitan Univ

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Author

Publications (20)

Proceedings Article | 4 March 2022 Presentation + Paper

Dynamic laser-based photomodulation of endovascular hydrogel embolization for the treatment of various cerebrovascular disorders

Jerry Ku, Yuta Dobashi, Christopher Pasarikovski, Joel Ramjist, John D. Madden, Konrad Walus, Victor X. Yang

Proceedings Volume 11945, 1194503 (2022) https://doi.org/10.1117/12.2605294

KEYWORDS: Aneurysms, Animal model studies, Angiography, Tumors, Polymers, Blood vessels

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Proceedings Article | 4 March 2022 Poster + Paper

Optimizing conditions for light delivery for intracranial photodynamic therapy for high grade gliomas: a 3D model study of light dosimetry

Jerry Ku, Yuta Dobashi, Joel Ramjist, Christopher Pasarikovski, Victor X. Yang

Proceedings Volume 11940, 119400I (2022) https://doi.org/10.1117/12.2605333

KEYWORDS: 3D modeling, Photodynamic therapy, Optical fibers, Tumors, Tissue optics, Light scattering, Light emitting diodes, Blood

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SPIE Journal Paper | 13 May 2021 Open Access

Minimally invasive intrathecal spinal cord imaging with optical coherence tomography

Christopher Pasarikovski, Jerry Ku, Joel Ramjist, Yuta Dobashi, Stefano Priola, Leodante da Costa, Ashish Kumar, Victor X. Yang

JBO, Vol. 26, Issue 05, 056002, (May 2021) https://doi.org/10.1117/12.10.1117/1.JBO.26.5.056002

KEYWORDS: Optical coherence tomography, Spinal cord, Coherence imaging, Optical imaging, Spine, Image acquisition, Nerve, Visualization, Veins, Tissues

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SPIE Journal Paper | 15 April 2020 Open Access

Doppler optical coherence tomography for energy seal evaluation and comparison to visual evaluation (Erratum)

Andrew Marques, Robnier Reyes, Christopher Pasarikovski, Chaoliang Chen, Joel Ramjist, Xijia Gu, Victor Yang

JBO, Vol. 25, Issue 04, 049801, (April 2020) https://doi.org/10.1117/12.10.1117/1.JBO.25.4.049801

KEYWORDS: Optical coherence tomography, Visualization, Doppler tomography, Biomedical engineering, Biomedical optics, Surgery, Medicine

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SPIE Journal Paper | 9 March 2020 Open Access

Doppler optical coherence tomography for energy seal evaluation and comparison to visual evaluation

Andrew Marques, Robnier Reyes, Christopher Pasarikovski, Chaoliang Chen, Joel Ramjist, Xijia Gu, Victor Yang

JBO, Vol. 25, Issue 03, 035003, (March 2020) https://doi.org/10.1117/12.10.1117/1.JBO.25.3.035003

KEYWORDS: Doppler tomography, Optical coherence tomography, Visualization, Laser systems engineering, Content addressable memory, Blood circulation, Laser irradiation, Ultrasonography, Surgery, Arteries

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Proceedings Article | 19 February 2020 Paper

Augmented reality and human factors regarding the neurosurgical operating room workflow

Nhu Nguyen, Jillian Cardinell, Joel Ramjist, Dimitrios Androutsos, Victor X. Yang

Proceedings Volume 11310, 113100D (2020) https://doi.org/10.1117/12.2546483

KEYWORDS: Surgery, Augmented reality, Tissues, Head-mounted displays, Medical imaging, Computed tomography, Human-computer interaction, Spine, 3D modeling, Transparency

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Proceedings Article | 17 February 2020 Paper

Localization and spatially anchoring objects of an augmented reality headset using an onboard fisheye lens

Philips Lai, Nhu Nguyen, Joel Ramjist, Jamil Jivraj, Ryan Deorajh, Dimitrios Androutsos, Victor X. Yang

Proceedings Volume 11225, 112250H (2020) https://doi.org/10.1117/12.2566594

KEYWORDS: Cameras, Head-mounted displays, Surgery, Augmented reality, Distance measurement, Sensors, Computed tomography

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Proceedings Article | 1 March 2019 Presentation + Paper

Intraoperative vascular detection and three-dimensional reconstruction using statistical variance and infrared optical tracking methods in high frequency ultrasound imaging

Shaurya Gupta, Chaoliang Chen, Yuta Dobashi, Emmanuel Cherin, Joel Ramjist, Stuart Foster, Albert Yee, Victor X. Yang

Proceedings Volume 10864, 108640K (2019) https://doi.org/10.1117/12.2510829

KEYWORDS: Ultrasonography, Speckle, Doppler effect, Surgery, Tissues, Blood, Blood circulation, Reconstruction algorithms, Navigation systems, Optical tracking

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Proceedings Article | 19 April 2017 Presentation

The characterization of neural tissue ablation rate and corresponding heat affected zone of a 2 micron Tm3+ doped fiber laser (Conference Presentation)

Andrew Marques, Jamil Jivraj, Robnier Reyes, Joel Ramjist, Xijia Gu, Victor X. Yang

Proceedings Volume 10050, 100500D (2017) https://doi.org/10.1117/12.2256306

KEYWORDS: Laser ablation, Tissues, Laser tissue interaction, Fiber lasers, Tissue optics, Spine, Brain, Laser induced damage, Laser systems engineering, Bone

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Proceedings Article | 19 April 2017 Presentation

Design of a head mounted optical tracking system for surgical navigation (Conference Presentation)

Ryan Deorajh, Peter Morcos, Jamil Jivraj, Joel Ramjist, Victor Yang

Proceedings Volume 10050, 100500L (2017) https://doi.org/10.1117/12.2256458

KEYWORDS: Surgery, Head, Neck, Optical tracking, Head-mounted displays, Infrared imaging, Infrared search and track, Infrared radiation, Data acquisition, Navigation systems

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Proceedings Article | 19 April 2017 Presentation

Graphics processor unit acceleration enables realtime endovascular Doppler optical coherence tomography imaging: development and validation (Conference Presentation)

Dexter Barrows, Joel Ramjist, Barry Vuong, Kenneth Lee, Jamil Jivraj, Victor X. Yang

Proceedings Volume 10050, 100500W (2017) https://doi.org/10.1117/12.2256623

KEYWORDS: Optical coherence tomography, Doppler tomography, Coherence imaging, Image processing, Blood, Visualization, Optical imaging, Pathology, Blood circulation, Skin

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Proceedings Article | 19 April 2017 Presentation

Assessment of hemodynamics of intracranial aneurysms using Doppler optical coherence tomography in patient specific phantoms: preliminary results (Conference Presentation)

Joel Ramjist, Jamil Jivraj, Dexter Barrows, Barry Vuong, Ronnie Wong, Victor X. Yang

Proceedings Volume 10050, 100500M (2017) https://doi.org/10.1117/12.2256532

KEYWORDS: Neurophotonics, Hemodynamics, Optical coherence tomography, Doppler tomography, Computational fluid dynamics, High speed cameras, Therapeutics, Pathology, Computer simulations, Device simulation

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Proceedings Article | 19 April 2017 Presentation

Comparison of optical localization techniques for optical coherence tomography of the hand for multi-fraction orthovoltage radiotherapy or photodynamic therapy: white light vs. optical surface imaging (Conference Presentation)

Raphael Jakubovic, Amitpal Bains, Joel Ramjist, Steve Babic, Lee Chin, Elizabeth Barnes, Victor X. Yang

Proceedings Volume 10037, 1003710 (2017) https://doi.org/10.1117/12.2252899

KEYWORDS: Therapeutics, Optical coherence tomography, Radiotherapy, Photodynamic therapy, Tissue optics, Radio optics, Optical imaging, Skin cancer, Phototherapy, Cancer

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Proceedings Article | 13 March 2017 Presentation + Paper

Preliminary development of augmented reality systems for spinal surgery

Nhu Nguyen, Joel Ramjist, Jamil Jivraj, Raphael Jakubovic, Ryan Deorajh, Victor X. Yang

Proceedings Volume 10050, 100500K (2017) https://doi.org/10.1117/12.2256483

KEYWORDS: Surgery, Augmented reality, 3D modeling, Visualization, Cameras, Calibration, Computing systems, Computer vision technology, Head-mounted displays, 3D metrology

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Proceedings Article | 17 February 2017 Paper

Multi-beam optical coherence tomography for microvascular imaging of human skin in vivo

Chaoliang Chen, Kyle H. Cheng, Raphael Jakubovic, Jamil Jivraj, Joel Ramjist, Ryan Deorajh, Wanrong Gao, Victor X. Yang

Proceedings Volume 10070, 1007017 (2017) https://doi.org/10.1117/12.2250739

KEYWORDS: Optical coherence tomography, Blood circulation, In vivo imaging, Skin, Signal to noise ratio, Medical imaging, Doppler tomography, Laser beam diagnostics, Speckle, Doppler effect, Phase shifts, Beam shaping

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Proceedings Article | 10 March 2015 Paper

Spinal cord deformation due to nozzle gas flow effects using optical coherence tomography

Ronnie Wong, Jamil Jivraj, Barry Vuong, Joel Ramjist, Cuiru Sun, Yize Huang, Victor Yang

Proceedings Volume 9305, 93050A (2015) https://doi.org/10.1117/12.2080607

KEYWORDS: Chemical species, Stars, Spinal cord, Eye, Optical telescopes, Composites, Nitrogen, Oxygen, Optical coherence tomography, Image processing

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Proceedings Article | 10 March 2015 Paper

Coaxial cavity injected OCT and fiber laser ablation system for real-time monitoring of ablative processes

Jamil Jivraj, Yize Huang, Ronnie Wong, Yi Lu, Barry Vuong, Joel Ramjist, Xijia Gu, Victor Yang

Proceedings Volume 9305, 930505 (2015) https://doi.org/10.1117/12.2080606

KEYWORDS: Optical coherence tomography, Fiber lasers, Laser ablation, Imaging systems, Linear filtering, Sensors, Laser systems engineering, Eye, Brain, Cameras

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Proceedings Article | 10 March 2015 Paper

Evaluation of hemodynamics changes during interventional stent placement using Doppler optical coherence tomography

Barry Vuong, Helen Genis, Ronnie Wong, Joel Ramjist, Jamil Jivraj, Hamza Farooq, Cuiru Sun, Victor Yang

Proceedings Volume 9305, 93050Q (2015) https://doi.org/10.1117/12.2080635

KEYWORDS: Optical coherence tomography, Hemodynamics, In vivo imaging, Independent component analysis, Arteries, Blood circulation, Doppler tomography, Computational fluid dynamics, 3D modeling, Doppler effect

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Proceedings Article | 9 March 2015 Paper

Development of a low cost, 3-DOF desktop laser cutter using 3D printer hardware

Jamil Jivraj, Yize Huang, Ronnie Wong, Yi Lu, Barry Vuong, Joel Ramjist, Xijia Gu, Victor Yang

Proceedings Volume 9356, 93560N (2015) https://doi.org/10.1117/12.2080629

KEYWORDS: 3D printing, Head, Computer aided design, Laser cutting, Printing, Switches, Metals, 3D imaging standards, Fluctuations and noise, Fiber lasers

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SPIE Journal Paper | 20 August 2014 Open Access

Histogram flow mapping with optical coherence tomography for in vivo skin angiography of hereditary hemorrhagic telangiectasia

Kyle Cheng, Adrian Mariampillai, Kenneth Lee, Barry Vuong, Timothy Luk, Joel Ramjist, M. Anne Curtis, Henry Jakubovic, Peter Kertes, Michelle Letarte, Marie Faughnan, Victor Yang

JBO, Vol. 19, Issue 08, 086015, (August 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.8.086015

KEYWORDS: Optical coherence tomography, Skin, Speckle, Tissues, In vivo imaging, Angiography, Brain, Blood vessels, Image processing, Tissue optics

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