Dr. Kawal S. Rhode Profile

Dr. Kawal S. Rhode

at Kings College London

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 18 March 2016 Paper

Interactive visualization for scar transmurality in cardiac resynchronization therapy

Sabrina Reiml, Daniel Toth, Maria Panayiotou, Bernhard Fahn, Rashed Karim, Jonathan Behar, Christopher Rinaldi, Reza Razavi, Kawal Rhode, Alexander Brost, Peter Mountney

Proceedings Volume 9786, 97862S (2016) https://doi.org/10.1117/12.2214737

KEYWORDS: Visualization, Heart, Lead, 3D modeling, Cardiology, Electrophysiology, Electrical breakdown, Image segmentation, Visual process modeling, 3D acquisition, 3D visualizations, Tissues, Magnetic resonance imaging

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Proceedings Article | 13 March 2009 Paper

Echocardiography to magnetic resonance image registration for use in image-guide electrophysiology procedures

YingLiang Ma, Kawal Rhode, Andrew King, Dennis Cauldfield, Michael Cooklin, Reza Razavi, Graeme Penney

Proceedings Volume 7261, 72610Q (2009) https://doi.org/10.1117/12.810999

KEYWORDS: Magnetic resonance imaging, Image registration, 3D image processing, X-rays, Ultrasonography, Image segmentation, X-ray imaging, Echocardiography, Electrophysiology, 3D modeling

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Proceedings Article | 13 March 2009 Paper

A novel technique for the three-dimensional visualization of radio-frequency ablation lesions using delayed enhancement magnetic resonance imaging

Benjamin Knowles, Dennis Caulfield, Matthew Ginks, Michael Cooklin, Julian Bostock, Aldo Rinaldi, Jaswinder Gill, Reza Razavi, Tobias Schaeffter, Kawal Rhode

Proceedings Volume 7261, 72610E (2009) https://doi.org/10.1117/12.812272

KEYWORDS: Magnetic resonance imaging, Visualization, Image fusion, Image segmentation, 3D image processing, 3D visualizations, Atrial fibrillation, Resonance enhancement, Image enhancement, 3D modeling

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Proceedings Article | 13 March 2009 Paper

A system for the registration of arthroscopic images to magnetic resonance images of the knee: for improved virtual knee arthroscopy

Chengliang Hu, Giancarlo Amati, Nicola Gullick, Stephen Oakley, Vassilios Hurmusiadis, Tobias Schaeffter, Graeme Penney, Kawal Rhode

Proceedings Volume 7261, 726119 (2009) https://doi.org/10.1117/12.813775

KEYWORDS: Video, Image registration, Magnetic resonance imaging, X-rays, Cameras, Calibration, Data modeling, Imaging systems, Optical tracking, 3D image processing

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Proceedings Article | 25 March 2008 Paper

Validation of the use of photogrammetry to register pre-procedure MR images to intra-procedure patient position for image-guided cardiac catheterization procedures

Gang Gao, Segolene Tarte, Andy King, Yingliang Ma, Phani Chinchapatnam, Tobias Schaeffter, Reza Razavi, Dave Hawkes, Derek Hill, Kawal Rhode

Proceedings Volume 6918, 69181Q (2008) https://doi.org/10.1117/12.770113

KEYWORDS: Magnetic resonance imaging, Chest, Photogrammetry, Imaging systems, Cardiac catheterization, Electrophysiology, 3D image processing, 3D modeling, Image registration, X-rays

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Proceedings Article | 25 March 2008 Paper

Ultrasound calibration using intensity-based image registration: for application in cardiac catheterization procedures

Y. Ma, K. Rhode, G. Gao, A. King, P. Chinchapatnam, T. Schaeffter, D. Hawkes, R. Razavi, G. Penney

Proceedings Volume 6918, 69180O (2008) https://doi.org/10.1117/12.770174

KEYWORDS: Calibration, Image registration, Ultrasonography, Liver, Transducers, 3D image processing, Optical tracking, Transform theory, Image filtering, Heart

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Proceedings Article | 25 March 2008 Paper

Evaluation of the use of multimodality skin markers for the registration of pre-procedure cardiac MR images and intra-procedure x-ray fluoroscopy images for image guided cardiac electrophysiology procedures

Kawal Rhode, Yingliang Ma, Angela Chandrasena, Andrew King, Gang Gao, Phani Chinchapatnam, Maxime Sermesant, David Hawkes, Tobias Schaeffter, Jaswinder Gill, Reza Razavi

Proceedings Volume 6918, 69181R (2008) https://doi.org/10.1117/12.770172

KEYWORDS: Skin, Image registration, Magnetic resonance imaging, X-rays, X-ray imaging, Fluoroscopy, Photovoltaics, Data modeling, Angiography, Electrophysiology

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Proceedings Article | 20 March 2008 Paper

A technique for respiratory motion correction in image guided cardiac catheterisation procedures

A. King, R. Boubertakh, K. L. Ng, Y. L. Ma, P. Chinchapatnam, G. Gao, T. Schaeffter, D. Hawkes, R. Razavi, K. Rhode

Proceedings Volume 6918, 691816 (2008) https://doi.org/10.1117/12.769377

KEYWORDS: Motion models, X-rays, X-ray imaging, Magnetic resonance imaging, Data modeling, Affine motion model, Image registration, 3D modeling, Heart, Cardiac catheterization

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Proceedings Article | 30 April 2004 Paper

XMR guided cardiac electrophysiology study and radio frequency ablation

Kawal Rhode, Maxime Sermesant, Sanjeet Hegde, Gerardo Sanchez-Ortiz, Daniel Rueckert, Reza Razavi, Derek Hill

Proceedings Volume 5369, (2004) https://doi.org/10.1117/12.535103

KEYWORDS: X-rays, Magnetic resonance imaging, X-ray imaging, Image registration, Motion models, Heart, Image segmentation, Electrodes, Radiofrequency ablation, Data modeling

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XMR systems are a new type of interventional facility in which patients can be rapidly transferred between x-ray and MR systems on a floating table. We have previously developed a technique to register MR and x-ray images obtained from such systems. We are carrying out a program of XMR guided cardiac electrophysiology study (EPS) and radio frequency ablation (RFA). The aim of our work was to apply our registration technology to XMR guided EPS/RFA in order to integrate anatomical, electrophysiological and motion information. This would assist in guidance and allow us to validate and refine electromechanical models. Registration of the imaging modalities was achieved by a combination of system calibration and real-time optical tracking. Patients were initially imaged using MR imaging. An SSFP volume scan of the heart was acquired for anatomical information, followed by tagged scans for motion information. The patients were then transferred to the x-ray system. Tracked biplane x-ray images were acquired while electrical measurements were made from catheters placed in the heart. The relationship between the MR and x-ray images was determined. The MR volume scan of the heart was segmented and the tagged scans were analysed using a non-rigid registration algorithm to compute motion. The position of catheters was reconstructed within the MR cardiac anatomy. The anatomical, electrophysiological, and motion information were displayed in the same coordinate system. Simulations of electrical depolarisation and contraction were performed using electromechanical models of the myocardium. We present results for 2 initial cases. For patient 1, a contact mapping system was used for the EPS and for patient 2, a non-contact mapping system was used. Our XMR registration technique allows the integration of anatomical, electrophysiological, and motion information for patients undergoing EPS/RFA. This integrated approach has assisted in interventional guidance and has been used to validate electromechanical models of the myocardium.

Proceedings Article | 30 April 2004 Paper

Detecting regional changes in myocardial contraction patterns using MRI

Gerardo Sanchez-Ortiz, Raghavendra Chandrashekara, Kawal Rhode, Reza Razavi, Derek Hill, Daniel Rueckert

Proceedings Volume 5369, (2004) https://doi.org/10.1117/12.536090

KEYWORDS: Image segmentation, Magnetic resonance imaging, Motion measurement, Image registration, Image acquisition, Motion models, 3D image processing, Heart, X-ray imaging, X-rays

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Proceedings Article | 24 April 2002 Paper

In-vitro validation of a novel model-based approach to the measurement of arterial blood flow waveforms from dynamic digital x-ray images

Kawal Rhode, Tryphon Lambrou, Alexander Seifalian, David Hawkes

Proceedings Volume 4683, (2002) https://doi.org/10.1117/12.463594

KEYWORDS: X-rays, Blood circulation, Model-based design, X-ray imaging, Angiography, Algorithm development, Digital x-ray imaging, Arteries, Principal component analysis, Data modeling

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Proceedings Article | 6 June 2000 Paper

Validation of an optical flow algorithm to measure blood flow waveforms in arteries using dynamic digital x-ray images

Kawal Rhode, Tryphon Lambrou, David Hawkes, George Hamilton, Alexander Seifalian

Proceedings Volume 3979, (2000) https://doi.org/10.1117/12.387652

KEYWORDS: Blood circulation, X-rays, X-ray imaging, Blood vessels, Optical flow, Iodine, Digital x-ray imaging, Calibration, Arteries, Blood

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Showing 5 of 12 publications

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