STEREOGRAPHICS ADDS STEREO VISUALIZATION TO DIAGNOSTIC IMAGERY USING
CRYSTALEYES AND CRYSTALEYES VIDEOSYSTEM

San Rafael, CA -- November 28, 1993 -- Two methods of enhancing diagnostic
images using stereo hardware provided by StereoGraphics were demonstrated
at the RSNA (Radiological Society of North America) show in Chicago, IL
this week. The demonstrations took place in the Image Processing and
Visualization computer-aided exhibit for radiologists. The RSNA '93
infoRAD exhibit (space 9212) provides attendees with a forum to highlight
advanced imaging tools for tomorrow.

StereoGraphics, the world's largest supplier of three-dimensional
electronic stereo display equipment, supplies both the CrystalEyes viewing
system and VideoSystem which enables the exhibit attendees to see the
stereo images.

Hewlett-Packard Co., will demonstrate the use of stereo and 24-bit
false-color imagery to enhance the visualization and segmentation of
multiparameter and/or multimodal diagnostic imagery. The demo involves
various academic and medical institutions, plus computer hardware and
software suppliers.

Simple false-color techniques coupled with the display of multiparameter
histograms and stereo viewing equipment enhance the visualization and
segmentation of multiparameter imagery. The false-color has been used with
suitable preprocessing to create color composites of 3-parameter (Tl, PD,
T2) weighted MR (magnetic resonance) images.

The exhibit consists of two demonstrations: 1) the use of false-color for
multiparameter MRI tissue discrimination; and 2) cine-stereo blood-flow
enhanced view into a normal human thorax.

The first demonstration features capability for segmenting color composited
data by interactively correlating clusters in histogram-space with areas
of tissue-space having the cluster's color.

The second demo includes a dataset consisting of ten volumes of 49 slices
-- each of 256x256x12-bits. The images are MR flow-enhanced such that
flowing blood appears as the brightest object. Then ten volumes are spaced
(via ECG gating) over a heart cycle. Volume-rendered stereo pairs have
been generated into the set. Each "cine" consists of a ten-frame stereo
cine-loop. Ninety such cines have been produced, spaced two degrees apart
around a vertical axis of rotation.

Wil Cochran, vice president of sales and marketing for StereoGraphics,
said, "StereoGraphics is dedicated to bringing the benefits of 3D stereo
viewing out of the laboratories and into common usage, especially for
medical applications. Such usage exemplifies the dramatic effect that
stereo viewing brings to the interpretation of complex medical images."

Irwin Sobel, member, technical staff, of Hewlett-Packard Laboratories, said
"In the future, it is expected that such techniques can be combined using
stereo technology to simultaneously view 3D histograms, and either slice
data or volume-rendered projections of color composited volume data.
Simultaneous interactive stereo viewing of 3D histograms and color
composited volume-rendered datasets can greatly facilitate the
segmentation of the data and enhance diagnosis."

The demonstration was coordinated by HP Labs, Palo Alto, CA and HP's Pisa
Science Center, Pisa, Italy, and involved a multitude of institutions
including the University of Pisa, Radiology Dept. and the University of
Genoa DIST Engineering Dept. Each of the above provided applications
development. Picker, Inc., Ohio, the University of Southern Florida, and
CNR, Pascale Tumor Institute of Naples, Italy, all provided data.

The equipment used included an HP 755 workstation, StereoGraphics
CrystalEyes viewing hardware and ISG Technologies, Inc., Toronto, Ontario,
Canada, Image Analysis Package, the 3D medical image processing
development environment.

StereoGraphics' CrystalEyes viewing system enables users to see computer
and video images in true stereo 3D. Color stereo images give users the
best sense of spatial relationships because they provide true visual
depth. Using three-dimensional images reduces design and development
cycles, improves accuracy and makes complex concepts easier to understand,
manipulate and implement.

The CrystalEyes VideoSystem is a completely self-contained 3-D stereo video
system and uses standard video cameras and works with virtually all video
equipment worldwide. The record/playback system is especially designed for
remote manipulation, such as medical or underwater operation, and for
fragile objects in special atmospheres, hazardous material handling (i.e.
nuclear), and outer space.

StereoGraphics has also demonstrated a system that integrates 3D stereo
endoscopic systems with data compression and telecommunications equipment.
In this configuration, the stereoscopic signals are available for video
teleconferencing, which will enable surgeons located thousands of miles
from an operation to view the procedure in stereo and consult while the
surgery is in progress.

In addition to medical imaging and surgical endoscopy, CrystalEyes products
are used to improve and dramatize video and computer presentations,
scientific visualization, molecular modeling, photogrammetry, motion
simulation, inspection systems, remote vehicle control, flight simulation
and all types of training.

StereoGraphics products produce stereo images by replicating the way people
view their surroundings in the real world. Because the eyes are positioned
a few inches apart, each sees the world from a slightly different
perspective. The brain then fuses these images into a single image that
has true stereo depth -- an effect known as "stereopsis."

A stereo image on a computer or video screen similarly contains two images,
called a stereo pair. StereoGraphics pioneered and holds the patents on
the CrystalEyes viewing process, which delivers the two images separately
to the right and left eye. The patented liquid crystal eyewear is
synchronized with the monitor, which alternately displays the left and
right images of each stereo pair at 120 frames per second. When the left
image is on the video screen, for example, the left lens of the eyewear
opens while the right lens closes -- thereby channeling the appropriate
image to the appropriate eye. The result is a non-flickering true stereo
image.

StereoGraphics Corp., founded in 1980 and the world's leading manufacturer
of stereo viewing systems, invented and developed the market for modern
stereo imaging hardware. Due to its capability, reasonable price and
state-of-the-art technology backed by 15 patents, CrystalEyes systems are
accepted as the industry standard for stereo viewing. StereoGraphics is
located at 2171 East Francisco Boulevard, San Rafael, California 94901,
phone 415/459-4500, fax 415/459-3020.

 ============================================================
 From the  'New Product Information'  Electronic News Service
 ============================================================
 This information was processed from data provided by the
 above mentioned company. For additional details, contact 
 the company at the address or telephone number indicated.
 OmniPage Pro is now used for converting all printed input! 
 ============================================================
 All submissions for this service should be addressed to:
 BAKER ENTERPRISES,  20 Ferro Dr,  Sewell, NJ  08080  U.S.A.
 Email: RBakerPC (AOL/Delphi), rbakerpc@delphi.com (Internet)
 ============================================================
