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PD0RDD > NASA 15.10.98 16:58l 104 Lines 4986 Bytes #-10039 (0) @ WW
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From: PD0RDD@PI8WNO.#UTR.NLD.EU
To : NASA@WW
Onderwerp: NASA 'SOFTWARE SCALPEL' HELPS DOCTORS PRACTICE OPERATIONS
Michael Braukus
Headquarters, Washington, DC October 13, 1998
(Phone: 202/358-1979)
John Bluck
Ames Research Center, Moffett Field, CA
(Phone: 650/604-5026)
RELEASE: 98-183
NASA 'SOFTWARE SCALPEL' HELPS DOCTORS PRACTICE OPERATIONS
A "software scalpel," combined with clear, accurate, three-
dimensional (3-D) images of the human head, is helping doctors
practice reconstructive surgery and visualize the outcome more
accurately.
Using the new approach, a physician wearing 3-D glasses can see
an image of a patient's head from all angles on a computer monitor,
or on the surface of a large "immersive virtual reality work bench."
Virtual reality is a computer-created environment that simulates
real-life situations.
"To predict what the result will be in a real operation, the
surgeon uses a computer mouse to mark the incision location and to
ask the computer to 'cut' bone," said Muriel Ross of NASA's Ames
Research Center, Moffett Field, CA. Ross is director of the Ames
Center for Bioinformatics, which uses computer technology to improve
medical practices. "The doctor can then remove the simulated piece
of bone or can place it at a new angle or in a new position."
"Because some patients have severe injury to the head or
diseases such as cancer, there are times when physicians must rebuild
a person's head or face," Ross said.
"We are working on an addition to the scalpel software that will
allow us to 'snap' a face back onto the 3-D image of the skull on
which a doctor has practiced an operation," she said. "The doctor
and the patient can then get a better idea of how the face will look
after the actual operation."
"Eventually, we want to provide a virtual tool for surgeons to
practice many sorts of surgery," said Aaron Lee, a student from
Princeton University, who worked in Ross' lab to develop the Virtual
Surgery Cutting Tool.
Each high-fidelity 3-D picture of a human head is known as a
'reconstruction,' or a computerized object. "The computerized
reconstructions are highly accurate, 3-D visual models of the head,
but can be made of any part of the human body," said Ross.
In the technique, a series of computed tomography (CT) scans are
combined to make the 3-D image using Reconstruction of Serial
Sections (ROSS) software previously developed by researchers at the
Ames Center for Bioinformatics. The Ames team also combined features
of the ROSS software with the CT scan version to reconstruct a breast
tumor from magnetic resonance images.
The NASA Center for Bioinformatics at Ames is part of a larger
National Biocomputation Center established by NASA and Stanford
University, Palo Alto, CA, according to Ross. "The new center is a
national resource to further the use of virtual reality in medicine,"
Ross said.
The Ames bioinformatics team is working on a variety of virtual
reality computer tools to aid in complex facial reconstructive
surgery and other procedures. Surgeons can use the big-screen
workbench, special gloves, as well as computer tracking wands and
other devices to manipulate 3-D computer images of patients.
The team is also interested in working with mastectomy patients
who require breast reconstruction, and with children who need
reconstructive surgery to correct deformities of the head and face.
Eventually, software systems could be used in other medical
specialties or surgical procedures.
In the future, virtual reality will allow surgeons to rehearse a
great many complex procedures before operations, according to Ross.
The team expects that, eventually, virtual reality will be a powerful
teaching tool for medical students. A digital library of
computerized "virtual patients" will be created that physicians can
use to share information about uncommon procedures, according to
researchers.
-end-
.
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