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1. Use of the HoloLens2 Mixed Reality Headset for Protecting Health Care Workers During the COVID-19 Pandemic: Prospective, Observational Evaluation

Author

Martin, Guy, Koizia, Louis, Kooner, Angad, Cafferkey, John, Ross, Clare, Purkayastha, Sanjay, Sivananthan, Arun, Tanna, Anisha, Pratt, Philip, and Kinross, James

Subjects
Computer applications to medicine. Medical informatics, R858-859.7, Public aspects of medicine, RA1-1270
Abstract

BackgroundThe coronavirus disease (COVID-19) pandemic has led to rapid acceleration in the deployment of new digital technologies to improve both accessibility to and quality of care, and to protect staff. Mixed-reality (MR) technology is the latest iteration of telemedicine innovation; it is a logical next step in the move toward the provision of digitally supported clinical care and medical education. This technology has the potential to revolutionize care both during and after the COVID-19 pandemic. ObjectiveThis pilot project sought to deploy the HoloLens2 MR device to support the delivery of remote care in COVID-19 hospital environments. MethodsA prospective, observational, nested cohort evaluation of the HoloLens2 was undertaken across three distinct clinical clusters in a teaching hospital in the United Kingdom. Data pertaining to staff exposure to high-risk COVID-19 environments and personal protective equipment (PPE) use by clinical staff (N=28) were collected, and assessments of acceptability and feasibility were conducted. ResultsThe deployment of the HoloLens2 led to a 51.5% reduction in time exposed to harm for staff looking after COVID-19 patients (3.32 vs 1.63 hours/day/staff member; P=.002), and an 83.1% reduction in the amount of PPE used (178 vs 30 items/round/day; P=.02). This represents 222.98 hours of reduced staff exposure to COVID-19, and 3100 fewer PPE items used each week across the three clusters evaluated. The majority of staff using the device agreed it was easy to set up and comfortable to wear, improved the quality of care and decision making, and led to better teamwork and communication. In total, 89.3% (25/28) of users felt that their clinical team was safer when using the HoloLens2. ConclusionsNew technologies have a role in minimizing exposure to nosocomial infection, optimizing the use of PPE, and enhancing aspects of care. Deploying such technologies at pace requires context-specific information security, infection control, user experience, and workflow integration to be addressed at the outset and led by clinical end-users. The deployment of new telemedicine technology must be supported with objective evidence for its safety and effectiveness to ensure maximum impact.

Published
2020
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3. Self-Supervised Siamese Learning on Stereo Image Pairs for Depth Estimation in Robotic Surgery

Author

Ye, Menglong, Johns, Edward, Handa, Ankur, Zhang, Lin, Pratt, Philip, and Yang, Guang-Zhong

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Robotics
Abstract

Robotic surgery has become a powerful tool for performing minimally invasive procedures, providing advantages in dexterity, precision, and 3D vision, over traditional surgery. One popular robotic system is the da Vinci surgical platform, which allows preoperative information to be incorporated into live procedures using Augmented Reality (AR). Scene depth estimation is a prerequisite for AR, as accurate registration requires 3D correspondences between preoperative and intraoperative organ models. In the past decade, there has been much progress on depth estimation for surgical scenes, such as using monocular or binocular laparoscopes [1,2]. More recently, advances in deep learning have enabled depth estimation via Convolutional Neural Networks (CNNs) [3], but training requires a large image dataset with ground truth depths. Inspired by [4], we propose a deep learning framework for surgical scene depth estimation using self-supervision for scalable data acquisition. Our framework consists of an autoencoder for depth prediction, and a differentiable spatial transformer for training the autoencoder on stereo image pairs without ground truth depths. Validation was conducted on stereo videos collected in robotic partial nephrectomy., Comment: A two-page short report to be presented at the Hamlyn Symposium on Medical Robotics 2017. An extension of this work is on progress

Published
2017

4. Motion-Compensated Autonomous Scanning for Tumour Localisation using Intraoperative Ultrasound

Author

Zhang, Lin, Ye, Menglong, Giannarou, Stamatia, Pratt, Philip, and Yang, Guang-Zhong

Subjects
Computer Science - Robotics
Abstract

Intraoperative ultrasound facilitates localisation of tumour boundaries during minimally invasive procedures. Autonomous ultrasound scanning systems have been recently proposed to improve scanning accuracy and reduce surgeons' cognitive load. However, current methods mainly consider static scanning environments typically with the probe pressing against the tissue surface. In this work, a motion-compensated autonomous ultrasound scanning system using the da Vinci Research Kit (dVRK) is proposed. An optimal scanning trajectory is generated considering both the tissue surface shape and the ultrasound transducer dimensions. A robust vision-based approach is proposed to learn the underlying tissue motion characteristics. The learned motion model is then incorporated into the visual servoing framework. The proposed system has been validated with both phantom and ex vivo experiments using the ground truth motion data for comparison., Comment: Accepted by Medical Image Computing and Computer Assisted Interventions Conference (MICCAI) 2017

Published
2017
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5. Simulation of Patient-Specific Deformable Ultrasound Imaging in Real Time

Author

Camara, Mafalda, Mayer, Erik, Darzi, Ara, Pratt, Philip, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Cardoso, M. Jorge, editor, Arbel, Tal, editor, Tavares, João Manuel R.S., editor, Aylward, Stephen, editor, Li, Shuo, editor, Boctor, Emad, editor, Fichtinger, Gabor, editor, Cleary, Kevin, editor, Freeman, Bradley, editor, Kohli, Luv, editor, Shipley Kane, Deborah, editor, Oetgen, Matt, editor, and Pujol, Sonja, editor

Published
2017
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8. Augmented Reality Imaging for Robot-Assisted Partial Nephrectomy Surgery

Author

Edgcumbe, Philip, Singla, Rohit, Pratt, Philip, Schneider, Caitlin, Nguan, Christopher, Rohling, Robert, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Zheng, Guoyan, editor, Liao, Hongen, editor, Jannin, Pierre, editor, Cattin, Philippe, editor, and Lee, Su-Lin, editor

Published
2016
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9. Visual Force Feedback for Hand-Held Microsurgical Instruments

Author

Gras, Gauthier, Marcus, Hani J., Payne, Christopher J., Pratt, Philip, Yang, Guang-Zhong, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Navab, Nassir, editor, Hornegger, Joachim, editor, Wells, William M., editor, and Frangi, Alejandro, editor

Published
2015
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10. Autonomous Ultrasound-Guided Tissue Dissection

Author

Pratt, Philip, Hughes-Hallett, Archie, Zhang, Lin, Patel, Nisha, Mayer, Erik, Darzi, Ara, Yang, Guang-Zhong, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Navab, Nassir, editor, Hornegger, Joachim, editor, Wells, William M., editor, and Frangi, Alejandro, editor

Published
2015
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11. Practical Intraoperative Stereo Camera Calibration

Author

Pratt, Philip, Bergeles, Christos, Darzi, Ara, Yang, Guang-Zhong, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Golland, Polina, editor, Hata, Nobuhiko, editor, Barillot, Christian, editor, Hornegger, Joachim, editor, and Howe, Robert, editor

Published
2014
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12. Multi-view Stereo and Advanced Navigation for Transanal Endoscopic Microsurgery

Author

Bergeles, Christos, Pratt, Philip, Merrifield, Robert, Darzi, Ara, Yang, Guang-Zhong, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Golland, Polina, editor, Hata, Nobuhiko, editor, Barillot, Christian, editor, Hornegger, Joachim, editor, and Howe, Robert, editor

Published
2014
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13. Pico Lantern: A Pick-up Projector for Augmented Reality in Laparoscopic Surgery

Author

Edgcumbe, Philip, Pratt, Philip, Yang, Guang-Zhong, Nguan, Chris, Rohling, Rob, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Golland, Polina, editor, Hata, Nobuhiko, editor, Barillot, Christian, editor, Hornegger, Joachim, editor, and Howe, Robert, editor

Published
2014
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17. Intraoperative Ultrasound Guidance for Transanal Endoscopic Microsurgery

Author

Pratt, Philip, Di Marco, Aimee, Payne, Christopher, Darzi, Ara, Yang, Guang-Zhong, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Ayache, Nicholas, editor, Delingette, Hervé, editor, Golland, Polina, editor, and Mori, Kensaku, editor

Published
2012
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18. Real-Time Stereo Reconstruction in Robotically Assisted Minimally Invasive Surgery

Author

Stoyanov, Danail, Scarzanella, Marco Visentini, Pratt, Philip, Yang, Guang-Zhong, Hutchison, David, Kanade, Takeo, Kittler, Josef, Kleinberg, Jon M., Mattern, Friedemann, Mitchell, John C., Naor, Moni, Nierstrasz, Oscar, Pandu Rangan, C., Steffen, Bernhard, Sudan, Madhu, Terzopoulos, Demetri, Tygar, Doug, Vardi, Moshe Y., Weikum, Gerhard, Jiang, Tianzi, editor, Navab, Nassir, editor, Pluim, Josien P. W., editor, and Viergever, Max A., editor

Published
2010
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19. Dynamic Guidance for Robotic Surgery Using Image-Constrained Biomechanical Models

Author

Pratt, Philip, Stoyanov, Danail, Visentini-Scarzanella, Marco, Yang, Guang-Zhong, Hutchison, David, Kanade, Takeo, Kittler, Josef, Kleinberg, Jon M., Mattern, Friedemann, Mitchell, John C., Naor, Moni, Nierstrasz, Oscar, Pandu Rangan, C., Steffen, Bernhard, Sudan, Madhu, Terzopoulos, Demetri, Tygar, Doug, Vardi, Moshe Y., Weikum, Gerhard, Jiang, Tianzi, editor, Navab, Nassir, editor, Pluim, Josien P. W., editor, and Viergever, Max A., editor

Published
2010
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20. Image Guidance and Surgery Simulation Using Inverse Nonlinear Finite Element Methods

Author

Pratt, Philip, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Bello, Fernando, editor, and Edwards, P. J. Eddie, editor

Published
2008
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21. A Novel Algorithm for Heart Motion Analysis Based on Geometric Constraints

Author

Hu, Mingxing, Penney, Graeme, Rueckert, Daniel, Edwards, Philip, Figl, Michael, Pratt, Philip, Hawkes, David, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Metaxas, Dimitris, editor, Axel, Leon, editor, Fichtinger, Gabor, editor, and Székely, Gábor, editor

Published
2008
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39. A remote access mixed reality teaching ward round

Author

Bala, Laksha, primary, Kinross, James, additional, Martin, Guy, additional, Koizia, Louis J., additional, Kooner, Angad S., additional, Shimshon, Gideon J., additional, Hurkxkens, Thomas J., additional, Pratt, Philip J., additional, and Sam, Amir H., additional

Published
2021
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