Research

 

Stanford University
    PhD in Computer Science, April 2007
    MS in Computer Science, September 2004
Texas A&M University
    BS in Computer Science, May 2002
    Minors in Electrical Engineering, Mathematics, Chemistry
El Paso Franklin High School
    Diploma, 1998

 

Robotic-Controlled Catheters for Heart Surgery

Hansen Medical
Mountain View, California
Senior Engineer
April 2007 - July 2009
Engineering Fellow
July 2009 - Present



Surgical Simulation and Haptics

Advisor: Dr. Ken Salisbury
Stanford Computer Science and Surgery
March 2003 to March 2007
Salisbury Group Homepage
Stanford AI and Robotics Lab Homepage
Computer Haptics and Active Interfaces Project Page
TA: Artificial Intelligence, Winter 2006
TA: Experimental Haptics, Spring 2006
For videos and pictures see the Stanford Bone Simulation Page and the Stanford Challenge website

Automatic Performance Evaluation in Surgical Simulation. Christopher Sewell. PhD Dissertation, Stanford University, March 2007. (ISBN 978-3-8364-8627-9). PDF

Providing Metrics and Performance Feedback in a Surgical Simulator. Christopher Sewell, Dan Morris, Nikolas H. Blevins, Sanjeev Dutta, Sumit Agrawal, Federico Barbagli, and Kenneth Salisbury. Computer Aided Surgery, Volume 13 Issue 2, March 2008, pp. 63-81. PDF Link

Representing Fluid with Smoothed Particle Hydrodynamics in a Cranial Base Simulator. Wen Liu, Christopher Sewell, Nikolas Blevins, Kenneth Salisbury, Kenneth Bodin, and Nils Hjelte. Proceedings of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, February 2008. PDF

The Effect of Virtual Haptic Training on Real Surgical Drilling Proficiency. Christopher Sewell, Nikolas H. Blevins, Sumanth Peddamatham, Hong Z. Tan, Dan Morris, and Kenneth Salisbury. Proc. of IEEE World Haptics Conference, Tsukuba, Japan, March 2007, pp. 601-603. PDF

Validating Metrics for a Mastoidectomy Simulator. Christopher Sewell, Dan Morris, Nikolas Blevins, Sumit Agrawal, Sanjeev Dutta, Federico Barbagli and Kenneth Salisbury. Proc. of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, February 2007, IOS Press, pp. 421-426. PDF

Evaluating Drilling and Suctioning Technique in a Mastoidectomy Simulator. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli and Kenneth Salisbury. Proc. of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, February 2007, IOS Press, pp. 427-432. PDF

Visuohaptic Simulation of Bone Surgery for Training and Evaluation. Dan Morris, Christopher Sewell, Federico Barbagli, Nikolas Blevins, Sabine Girod, and Kenneth Salisbury. IEEE Transactions on Computer Graphics and Applications, November 2006, pp. 48-57. PDF

Achieving Proper Exposure in Surgical Simulation. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli and Kenneth Salisbury. Proceedings of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, January 2006, IOS Press, pp. 497-502. PDF

Metrics for a Mastoidectomy Simulator. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2005. Poster

CHAI: An Open-Source Library for the Rapid Development of Haptic Scenes. Francois Conti, Federico Barbagli, Dan Morris, and Christopher Sewell. Demo at World Haptics, Pisa, Italy, March 2005. Abstract

A Simulator for Training a Full Mastoidectomy Procedure. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Demo at World Haptics, Pisa, Italy, March 2005. Abstract

Quantifying Risky Behavior in Surgical Simulation. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Proceedings of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, January 2005, IOS Press, pp. 451-457. PDF

Training the Cognitive and Stylistic Aspects of Surgery Through Simulation. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2004. Best Poster Award. Abstract

A Collaborative Virtual Environment for the Simulation of Temporal Bone Surgery. Dan Morris, Christopher Sewell, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2004. Abstract

An Event-Driven Framework for the Simulation of Complex Surgical Procedures. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Proceedings of the International Conference on Medical Imaging Computing and Computer Assisted Intervention (MICCAI), St. Malo, France, September 2004, Springer Lecture Notes in Computer Science, Vol. II, pp. 346-354. PDF

A Collaborative Virtual Environment for the Simulation of Temporal Bone Surgery. Dan Morris, Christopher Sewell, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Proceedings of the International Conference on Medical Imaging Computing and Computer Assisted Intervention (MICCAI), St. Malo, France, September 2004, Springer Lecture Notes in Computer Science, Vol. II, pp. 319-327. PDF

Haptic Interaction to Simulate Complex Surgical Procedures. Christopher Sewell, Kenneth Salisbury, Federico Barbagli, Tom Krummel, and Jean-Claude Latombe. Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2003. Abstract


In the news

Getting the Feel of Surgery. Video on Stanford Challenge Website. Webpage

Engineers, medical scholars team up to create new technologies to fight disease. Amy Adams. Stanford Report, October 22, 2003. Article

Getting a feel for surgery. Shawne Neeper. UCSC Science Notes, 2004. Article


My summaries of selected deformable objects, finite elements, and fluid dynamics papers

A Survey of Deformable Modeling in Computer Graphics. Sarah Gibson et. al. PDF

Finite Element Methods using Impact. Program by Jonas Forssell et. al. PDF

Elastically Deformable Objects. Demetri Terzopoulos et. al. PDF

Cutting in Deformable Objects. Thesis by Han-Wen Nienhuys. PDF

Real-Time Fluid Dynamics for Games. Jos Stam. PDF


Some lectures I've made for classes I've TA'ed

Proofs for the A* Search Algorithm PDF

Using CHAI for Developing Haptic Applications PDF

The God-Object / Proxy Haptic Rendering Algorithm, including Friction, Force Shading, and Textures PDF

Deformable Modeling PDF

Collision Detection PDF

Haptic Audio PDF



Protein Sequencing

Advisor: Dr. Olaf Lubeck
Los Alamos National Lab
May 2002 to August 2002

New Computational Approaches for De Novo Peptide Sequencing from MS/MS Experiments. Olaf Lubeck, Christopher Sewell, Sheng Gu, and Xian Chen. IEEE Proc. on Challenges in Biomedical Informatics, 2002, 90(12), 1868-1874. PDF

Algorithm for Sequencing Proteins Using Mass Spectrometry Data. Oral presentation at Los Alamos National Laboratory Symposium, Los Alamos, NM, July 2002.



Computational Chemistry and Cell Modeling

Advisor: Dr. Paul Lindahl
Texas A&M Chemistry
December 1998 to May 2002
Lindahl Group Homepage

The Biocomplexity Project. Christopher Sewell. Undergraduate Honors Thesis, Texas A&M University, May 2001. Abstract

Reduction and Methyl Transfer Kinetics of the Alpha Subunit from Acetyl Coenzyme A Synthase. Xiangshi Tan, Christopher Sewell, Qingwu Yang, Paul A. Lindahl. J. Am. Chem. Soc. (Comm.), 2003, 125(2), 318-319. PDF

Quantitative Analysis of Protein Homeostatic Mechanisms Used in Living Systems. Christopher Sewell, Jeffrey J Morgan, and Paul A Lindahl. J. of Theoretical Bio. 2002, 215, 151-167. PDF

Stopped-Flow Kinetics of the Methyl Group Transfer between Acetyl-Coenzyme A Synthase and the Corrinoid-Iron-Sulfur Protein from Clostridium thermoaceticum. Xiangshi Tan, Christopher Sewell, and Paul A. Lindahl. J. Am. Chem. Soc., 2002, 124(22), 6277-6284. PDF

Kinetic Mechanism of Acetyl-CoA Synthase: Steady-State Synthesis at Variable CO/CO2 Pressures. Ernest L. Maynard, Christopher Sewell, and Paul A. Lindahl. J. Am. Chem. Soc., 2001, 123(20), 4697-4703. PDF

Method for Modeling Complex Biochemical Processes from Semi-Fabricated Concentration-vs-Time Plots of All Reacting Components. Poster presentation at the Pfizer Chemical Undergraduate Research Symposium, Groton, CT, April 2002.

Analysis of Steady-State Protein Homeostatic Regulatory Mechanisms in Perturbed Environments. Christopher Sewell, Jeffrey J. Morgan, and Paul A. Lindahl. Poster presentation at the International Conference on Systems. Biology, Pasadena, California, November 2001. Abstract

Method for Simulating the Kinetics of Cell Growth and Division at the Molecular Level. Christopher Sewell, Charles Johnson, Jeffrey J. Morgan, and Paul A. Lindahl. Poster presentation at the International Conference on Systems Biology, Pasadena, California, November 2001. Abstract

Oral presentations given at the Texas A&M Student Research Week Symposiums, College Station, TX, March 1999, March 2000, March 2001, and March 2002.

Oral presentation given at the Texas A&M Undergraduate Research Fellows Symposium, College Station, TX, April 2001.



Protein Folding

Advisor: Dr. Nancy Amato
Texas A&M Computer Science
May 2001 to May 2002
Amato Group Homepage

Contributed to Using Motion Planning to Map Protein Folding Landscapes and Analyze Folding Kinetics of Known Native Structures. Nancy Amato, Ken Dill, and Guang Song, Proceedings of the Sixth Annual Int'l Conf. on Computational Molecular Biology (RECOMB), April 2002, 2-11. PDF



Supercomputer Efficiency

El Paso Franklin High School and Lincoln Middle School
November 1993 to May 1998

Supercomputer Parallel Architectures: A Fifth-Year Study of Supercomputer Efficiency. Oral presentation at the National Junior Science and Humanities Symposium, Raleigh, NC, April 1998, and poster presentation at the Intel International Science and Engineering Fair, Fort Worth, TX, May 1998. Abstract