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Wilson Chang
Visiting Scholar

No longer a member of RI.

Email address: wmcst6@pitt.edu

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In addition to being a Visiting Scholar at CMU, I am MD/PhD Student at the University of Pittsburgh. My PhD advisor was Dr. George Stetten, MD/PhD, who is a Research Scientist at CMU and an Assistant Professor at the University of Pittsburgh. I earned my PhD in Bioengineering at the University of Pittsburgh in August 2004. Prior to Pittsburgh, I earned a B.S. and M.S. in Computer Science at the University of Wisconsin-Madison. I have also completed 2 years of medical school.

Our research has two main focuses: 1. Real-Time Tomographic Reflection (RTTR) and specifically the Sonic Flashlight, and 2. Medical image analysis and development of the Insight Tool Kit (ITK). The Sonic Flashlight is a novel method for displaying ultrasound images in-situ without any head mounted display apparatus. We are currently planning on moving this to preliminary clinical and animal studies. ITK is a National Library of Medicine funded, extreme-programming project with development spearheaded by GE, Kitware, Insightful, and numerous universities. ITK is a open-source tool kit to perform many commonly utilized methods for image analysis and segmentation. We contribute to the core ITK and our algorithms, specifically medial node/core-atom based shape analysis.

bioengineering, image processing, medical applications, medical imaging, and object recognition

• Human-Robot Interaction Group - We are interested in many aspects of human-robot interaction related to how humans and robots can work safely and effectively together.

• Sonic Flashlight^TM - We are developing a method of medical visualization that merges real time ultrasound images with direct human vision.

• First Clinical Trial of the Sonic Flashlight - Guiding Placement of Peripherally Inserted Central Catheters
  W. Chang, N. Amesur, D.C. Wang, A. Zajko, and G.D. Stetten
  2005 meeting of the Radiological Society of North America, November, 2005.

• Guiding Vascular Access with the Sonic Flashlight - Preclinical Development and Validation
  W. Chang
  doctoral dissertation, Department of Bioengineering, University of Pittsburgh, August, 2005. [Abstract]

• Real-Time Ultrasound Image Analysis for the Insight Toolkit
  D.C. Wang, W. Chang, and G.D. Stetten
  Technical report in special MICCAI 2005 Workshop on Open-Source Software issue of The Insight Journal, August, 2005. [Abstract]
  Download: pdf [29 KB] copyrighted

• The Sonic Flashlight Is Faster To Learn And Use Compared To Conventional Ultrasound Guidance: A Comparison Of Ultrasound Guided Vascular Access Devices In Phantoms
  W. Chang, N. Amesur, A. Zajko, and G.D. Stetten
  105th annual meeting of the American Roentgen Ray Society, May, 2005.
  Download: pdf [31 KB] copyrighted

• Intuitive intra-operative ultrasound guidance using the Sonic Flashlight, a novel ultrasound display system
  W. Chang, M. Horowitz, and G.D. Stetten
  Neurosurgery, Operative Neurosurgery Supplement 2, Vol. 56, No. 4, April, 2005, pp. 434 - 437. [Abstract]

• C-mode Virtual Image Display for a Matrix Array Ultrasound Sonic Flashlight
  G.D. Stetten, C.A. Cois, W. Chang, D.M. Shelton, R.J. Tamburo, J. Castellucci, and O. von Ramm
  Academic Radiology, 2005. [Abstract]

• Cadaveric central venous access using the Sonic Flashlight, a novel ultrasound display system
  W. Chang, N. Amesur, A. Zajko, and G.D. Stetten
  2004 meeting of the Radiological Society of North America, December, 2004.
  Download: pdf [70 KB] copyrighted

• Refining the sonic flashlight for interventional procedures
  W. Chang, N. Amesur, M. Horowitz, and G.D. Stetten
  IEEE International Symposium on Biomedical Imaging, April, 2004. [Abstract]
  Download: pdf [2844 KB] copyrighted

• Progress Towards a Clinically Useful Sonic Flashlight
  G.D. Stetten, D.M. Shelton, W. Chang, R.J. Tamburo, V. Chib, C.A. Cois, R. Hollis, A. Rizzi, L. Lobes, and D. Schwartzman
  Biomedical Imaging Research Opportunities Workshop, January, 2003. [Abstract]
  Download: pdf [15 KB] copyrighted

• C-mode Virtual Image Display for a Matrix Array Ultrasound Sonic Flashlight
  G.D. Stetten, C.A. Cois, W. Chang, D.M. Shelton, R.J. Tamburo, J. Castellucci, and O. von Ramm
  Medical Image Computing and Computer-Assisted Intervention - MICCAI, Lecture Notes in Computer Science, Vol. 2879,, 2003, pp. 336 - 343. [Abstract]
  Download: pdf [1631 KB] copyrighted