Mr. Patrick Cheng Profile

Patrick Cheng

Student at Georgetown Univ

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Publications (9)

Proceedings Article | 24 February 2011 Paper

Conformal needle-based ultrasound ablation using EM-tracked conebeam CT image guidance

E. Clif Burdette, Filip Banovac, Chris Diederich, Patrick Cheng, Emmanuel Wilson, Kevin Cleary

Proceedings Volume 7901, 790107 (2011) https://doi.org/10.1117/12.876550

KEYWORDS: Ultrasonography, Tissues, Liver, Tumors, Computed tomography, Kidney, Control systems, Electromagnetism, Thermal modeling, Acoustics

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Numerous studies have demonstrated the efficacy of interstitial ablative approaches for the treatment of renal and hepatic tumors. Despite these promising results, current systems remain highly dependent on operator skill, and cannot treat many tumors because there is little control of the size and shape of the zone of necrosis, and no control over ablator trajectory within tissue once insertion has taken place. Additionally, tissue deformation and target motion make it extremely difficult to accurately place the ablator device into the target. Irregularly shaped target volumes typically require multiple insertions and several sequential thermal ablation procedures. This study demonstrated feasibility of spatially tracked image-guided conformal ultrasound (US) ablation for percutaneous directional ablation of diseased tissue. Tissue was prepared by suturing the liver within a pig belly and 1mm BBs placed to serve as needle targets. The image guided system used integrated electromagnetic tracking and cone-beam CT (CBCT) with conformable needlebased high-intensity US ablation in the interventional suite. Tomographic images from cone beam CT were transferred electronically to the image-guided tracking system (IGSTK). Paired-point registration was used to register the target specimen to CT images and enable navigation. Path planning is done by selecting the target BB on the GUI of the realtime tracking system and determining skin entry location until an optimal path is selected. Power was applied to create the desired ablation extent within 7-10 minutes at a thermal dose (>300eqm43). The system was successfully used to place the US ablator in planned target locations within ex-vivo kidney and liver through percutaneous access. Targeting accuracy was 3-4 mm. Sectioned specimens demonstrated uniform ablation within the planned target zone. Subsequent experiments were conducted for multiple ablator positions based upon treatment planning simulations. Ablation zones in liver were 73cc, 84cc, and 140cc for 3, 4, and 5 placements, respectively. These experiments demonstrate the feasibility of combining real-time spatially tracked image guidance with directional interstitial ultrasound ablation. Interstitial ultrasound ablation delivered on multiple needles permit the size and shape of the ablation zone to be "sculpted" by modifying the angle and intensity of the active US elements in the array. This paper summarizes the design and development of the first system incorporating thermal treatment planning and integration of a novel interstitial acoustic ablation device with integrated 3D electromagnetic tracking and guidance strategy.

Proceedings Article | 13 March 2009 Paper

Interfacing proprietary hardware with the image-guided surgery toolkit (IGSTK): a case for the OpenIGTLink protocol

Sebástián Ordas, Ziv Yaniv, Patrick Cheng, Junichi Tokuda, Haying Liu, Nobuhiko Hata, Kevin Cleary

Proceedings Volume 7264, 72640F (2009) https://doi.org/10.1117/12.811667

KEYWORDS: Navigation systems, Calibration, Optical tracking, Electromagnetism, Image-guided intervention, Imaging systems, Operating systems, Telecommunications, Image acquisition, Data acquisition

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Proceedings Article | 17 March 2008 Paper

Accuracy analysis of an image-guided system for vertebroplasty spinal therapy based on electromagnetic tracking of instruments

Jienan Ding, Noureen Khan, Patrick Cheng, Emmanuel Wilson, Vance Watson, Kevin Cleary, Ziv Yaniv

Proceedings Volume 6918, 69181K (2008) https://doi.org/10.1117/12.772794

KEYWORDS: Navigation systems, Electromagnetism, Image registration, Image-guided intervention, Computed tomography, Sensors, Human-machine interfaces, Image analysis, X-rays, 3D image processing

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Proceedings Article | 17 March 2008 Paper

Phantom evaluation of an image-guided navigation system based on electromagnetic tracking and open source software

Ralph Lin, Peng Cheng, David Lindisch, Filip Banovac, Justin Lee, Kevin Cleary

Proceedings Volume 6918, 691826 (2008) https://doi.org/10.1117/12.771254

KEYWORDS: Navigation systems, Tumors, Electromagnetism, Open source software, Foam, Radiofrequency ablation, Liver, Skin, Biopsy, Medical imaging

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Proceedings Article | 13 March 2008 Paper

Integration of a real-time video grabber component with the open source image-guided surgery toolkit IGSTK

Ole Vegard Solberg, Geir-Arne Tangen, Frank Lindseth, Torleif Sandnes, Andinet Enquobahrie, Luis Ibáñez, Patrick Cheng, David Gobbi, Kevin Cleary

Proceedings Volume 6919, 69190Z (2008) https://doi.org/10.1117/12.772491

KEYWORDS: Video, Ultrasonography, Image-guided intervention, Medical imaging, 3D video streaming, Computed tomography, 3D image processing, Imaging systems, Visualization, Surgery

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Proceedings Article | 3 April 2007 Paper

Precision instrument placement using a 4-DOF robot with integrated fiducials for minimally invasive interventions

Roland Stenzel, Ralph Lin, Peng Cheng, Gernot Kronreif, Martin Kornfeld, David Lindisch, Bradford Wood, Anand Viswanathan, Kevin Cleary

Proceedings Volume 6509, 65092S (2007) https://doi.org/10.1117/12.712276

KEYWORDS: Computed tomography, Human-machine interfaces, Error analysis, Space robots, Skin, Robotics, Image registration, Instrument modeling, Imaging systems, Medical imaging

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Proceedings Article | 22 March 2007 Paper

PETglove: a new technology for portable molecular imaging

Kenneth Wong, Lucian Gruionu, Patrick Cheng, Pamela Abshire, Valeri Saveliev, Seong Mun, Kevin Cleary, Irving Weinberg

Proceedings Volume 6509, 65092P (2007) https://doi.org/10.1117/12.712870

KEYWORDS: Sensors, Positron emission tomography, Imaging systems, Electromagnetism, Scanners, Human-machine interfaces, Photomultipliers, Tumors, Prototyping, Molecular imaging

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Proceedings Article | 21 March 2007 Paper

The Image-Guided Surgery ToolKit IGSTK: an open source C++ software toolkit

Peng Cheng, Luis Ibanez, David Gobbi, Kevin Gary, Stephen Aylward, Julien Jomier, Andinet Enquobahrie, Hui Zhang, Hee-su Kim, M. Brian Blake, Kevin Cleary

Proceedings Volume 6516, 65160A (2007) https://doi.org/10.1117/12.719562

KEYWORDS: Software development, Image-guided intervention, Safety, Logic, C++, Visualization, Optical tracking, Computer programming, Control systems, Open source software

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Proceedings Article | 10 March 2006 Paper

IGSTK: framework and example application using an open source toolkit for image-guided surgery applications

Peng Cheng, Hui Zhang, Hee-su Kim, Kevin Gary, M. Brian Blake, David Gobbi, Stephen Aylward, Julien Jomier, Andinet Enquobahrie, Rick Avila, Luis Ibanez, Kevin Cleary

Proceedings Volume 6141, 61411Y (2006) https://doi.org/10.1117/12.660583

KEYWORDS: Biopsy, Image-guided intervention, Prototyping, Image registration, Open source software, Visualization, Computed tomography, Software development, Surgery, Safety

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Showing 5 of 9 publications

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