Named Kaneb Faculty Fellow
• Computational Medicine Group Helps Improve Radiation
Therapy Treatment Time
• Streigel Recevies NSF CAREER Award
• Computer Vision Research Laboratory: More
than Meets the Eye
Named Kaneb Faculty Fellow
Patrick J. Flynn, professor of computer science and engineering, has
been named a faculty fellow for 2004-05 by the John A. Kaneb Center
for Teaching and Learning.
Established in 1995, the center assists Notre
Dame faculty in evaluating and improving their teaching abilities as
well as incorporating technology into classroom activities. Each year
the center honors outstanding faculty across the University.
eight fellows named for the current academic year, Flynn will join
the other fellows in sharing his teaching experiences and techniques
through a series of workshops, discussions groups, research projects,
and individual consultations.
Flynn received his bachelor’s degree in electrical engineering,
his master’s degree in computer science, and his doctorate
in computer science, all from Michigan State University.
the Computer Vision Research Laboratory with Kevin
W. Bowyer, the
Schubmehl-Prein Chair in Computer Science and Engineering. Working
with student researchers, they have assembled one of the largest
and most comprehensive multi-modal biometric signature databases
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Medicine Group Helps Improve Radiation Therapy Treatment Time
The goal of researchers and physicians in radiation therapy is to
deliver high doses of radiation to a targeted area while minimizing
the damage to surrounding normal tissue and critical organs. One
of the current techniques is called intensity-modulated radiation
therapy (IMRT), which requires the ability to generate non-uniform
Steps taken during a typical IMRT treatment include scanning
the area to provide a tomographic image of the tumor and surrounding
tissue, calculating the dosage based on the tomography of the tumor,
setting the “movements” of the cylinder -- a computer-controlled
multileaf collimator (MLC) which delivers the beams of radiation,
and then delivering the radiation. The challenge is in generating a plan for
the movements of the MLC, because it consists of up to 80 pairs of tungsten
leaves which must each be adjusted to accurately shape the beam. This is called
leaf-sequencing, and it is a vital part of the treatment plan as the maximum
dose required must be delivered in the minimum amount of time.
Using new algorithms
and computational geometry techniques, the Computational Medicine
Group at Notre Dame has been developing solutions to this leaf-sequencing
challenge. The team, led by Danny Z. Chen, professor
of computer science and engineering, includes Sharon
X. Hu, associate professor
of computer science and engineering, graduate students Shuang
Luan and Chao Wang, and
former Ph.D. candidate Xiaodong
Wu. The Notre
Dame team has been collaborating with researchers in the Department
of Radiation Oncology at the University of Maryland School of Medicine,
who are performing extensive experimental studies using the new algorithms
and software developed at Notre Dame.
This software, called SLS, produces
IMRT plans that compare favorably with the currently available IMRT
software, while reducing the time required to establish the plan
by approximately two-thirds. As a result, the SLS software is now
being used in the University of Maryland Medical Center and the Helen
P. Denit Cancer Center in Montgomery General Hospital. Journal papers
on the work have been accepted for publication in the Journal
of Physics in Medicine and Biology and the Journal
of Medical Physics. Research results were also presented at the 45th Annual Meeting and
Technical Exhibition of the American Association of Physicists in
Medicine and the 19th ACM (Association for Computing Machinery) Symposium
on Computational Geometry.
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Receives NSF CAREER Award
Assistant Professor Aaron Striegel has been named
a recipient of the National Science Foundation’s Early Career
Development (CAREER) Award. This is the highest honor given by the
U.S. government to junior faculty in engineering and science.
in 1995, the CAREER program recognizes and supports “exceptionally
promising college and university junior faculty who are committed to
the integration of research and education,” says NSF Director
Rita R. Colwell. “Its goal is to help top-performing scientists
and engineers early in their careers to simultaneously develop their
contributions and commitment to research and education.”
joined the Department of Computer Science and Engineering in 2003.
He received both his bachelor’s and doctoral degrees
in computer engineering from Iowa State University. He is receiving
the CAREER award for his work on stealth multicast techniques, titled “Transparent
Bandwidth Conservation Techniques.”
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||Computer Vision Research Laboratory: More than
Meets the Eye
Scanning a photograph or slide on a desktop computer and
then printing it on a laser or ink-jet printer produces a two-dimensional
flat. Even though it may still show a stunning subject, there are nuances
to the image that have been lost. These nuances are extremely important
to photographers who wish to capture the beauty of nature or a particular
object. They are more vital in computer vision research, where three-dimensional
(3D) images are providing data that can be used in a variety of applications,
including biometric identification for homeland security, virtual reality,
historical preservation, and archaeology.
For example, faculty
and students in the Computer Vision Research Laboratory are applying
3D scanning, modeling, and rapid prototyping to the fabrication of
missing bones in Peck’s Rex, one of the highest-quality T.Rex
skeletons ever discovered. While an undergraduate in the Department
of Computer Science and Engineering, Chris
Boehnen wrote a software
program that automatically converted digital photographs into files
which described the dimensional geometry of a shape for modeling processes.
As a graduate student, he is now applying rapid prototyping techniques to configure
the missing bones of the T.Rex. Boehnen; Patrick
J. Flynn, professor
of computer science and engineering; and J.
Keith Rigby, associate
professor of civil engineering and geological sciences, scanned the
shape of the existing bones and duplicated them at the correct scale
and position to complete the dinosaur. Replicas of their work are currently
on display in Notre Dame’s Eck Visitors’ Center.
the Computer Vision Research Laboratory is directed by Flynn and Kevin
W. Bowyer, the Schubmehl-Prein Chair in Computer Science and Engineering,
and supported by the National Science Foundation, Sandia National Laboratories,
and the Defense Advanced Research Projects Agency.
For more information on 3D scanning, modeling, and fabrication within
the Department of Computer Science and Engineering, visit http://www.cse.nd.edu/research/labs.php.
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