J
Joel Ramjist
Researcher at Ryerson University
Publications - 44
Citations - 255
Joel Ramjist is an academic researcher from Ryerson University. The author has contributed to research in topics: Optical coherence tomography & Medicine. The author has an hindex of 8, co-authored 37 publications receiving 170 citations. Previous affiliations of Joel Ramjist include Sunnybrook Health Sciences Centre & University of Toronto.
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Journal ArticleDOI
High Speed, High Density Intraoperative 3D Optical Topographical Imaging with Efficient Registration to MRI and CT for Craniospinal Surgical Navigation
Raphael Jakubovic,Raphael Jakubovic,Daipayan Guha,Daipayan Guha,Shaurya Gupta,Shaurya Gupta,Michael Lu,Jamil Jivraj,Jamil Jivraj,Beau Anthony Standish,Michael K. K. Leung,Adrian Mariampillai,Kenneth Lee,Peter Siegler,Patryk Skowron,Patryk Skowron,Hamza Farooq,Hamza Farooq,Nhu Q. Nguyen,Nhu Q. Nguyen,Joseph Alarcon,Joseph Alarcon,Ryan Deorajh,Ryan Deorajh,Joel Ramjist,Joel Ramjist,Michael Ford,Peter Howard,Peter Howard,Nicolas Phan,Leo da Costa,Chris Heyn,Chris Heyn,Gamaliel Tan,Rajeesh George,David W. Cadotte,Todd G. Mainprize,Albert Yee,Victor X. D. Yang +38 more
TL;DR: This work introduces an experimental navigation system utilizing optical topographical imaging (OTI) to acquire the 3D surface anatomy of the surgical cavity, enabling visualization of internal structures relative to exposed surface anatomy from registered preoperative images.
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Pulsed and CW adjustable 1942 nm single-mode all-fiber Tm-doped fiber laser system for surgical laser soft tissue ablation applications.
TL;DR: The results conclude that the system parameters can be tailored to meet different clinical requirements such as ablation for soft tissue cutting or thermal coagulation for future applications of hemostasis.
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An augmented reality system characterization of placement accuracy in neurosurgery.
Nhu Q. Nguyen,Jillian Cardinell,Joel Ramjist,Philips Lai,Yuta Dobashi,Yuta Dobashi,Daipayan Guha,Dimitrios Androutsos,Victor X. D. Yang,Victor X. D. Yang +9 more
TL;DR: A novel method to quantify registration accuracy for augmented reality (AR) devices in neurosurgery is proposed to improve ease of use for surgical navigation and provide a system which complements the existing operating room workflow.
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Histogram flow mapping with optical coherence tomography for in vivo skin angiography of hereditary hemorrhagic telangiectasia
Kyle H. Y. Cheng,Kyle H. Y. Cheng,Adrian Mariampillai,Kenneth Lee,Kenneth Lee,Barry Vuong,Timothy W. H. Luk,Joel Ramjist,E. Anne Curtis,Henry Jakubovic,Peter J. Kertes,Michelle Letarte,Marie E. Faughnan,Victor X. D. Yang,Victor X. D. Yang +14 more
TL;DR: A method to map out the microvasculature malformation of skin based on the time-domain histograms of individual pixels is presented with results obtained from both normal skin and skin containing vascular malformation, and potential applications include clinical imaging of skin vascular abnormalities and wide-field skin angiography for the study of complex vascular networks.
Journal ArticleDOI
High speed, wide velocity dynamic range Doppler optical coherence tomography (Part V): Optimal utilization of multi-beam scanning for Doppler and speckle variance microvascular imaging.
Chaoliang Chen,Kyle H. Y. Cheng,Raphael Jakubovic,Jamil Jivraj,Joel Ramjist,Ryan Deorajh,Wanrong Gao,Elizabeth Barnes,Lee Chin,Victor X. D. Yang +9 more
TL;DR: This is the first demonstration of combining different spot size, staggered multiple optical foci scanning, to achieve enhanced SNR for blood flow OCT imaging, and it can be as high as 10 dB.