Confident diagnosis with easier
workflow
GE Healthcare
Overview
Gemstone Spectral Imaging (GSI) is a
novel dual energy application that uses
rapid kV switching to acquire the dual
energy samples almost simultaneously
to generate material density data that
can be used for the separation of
materials and derivation of
monochromatic spectral images using
a projection based reconstruction
algorithm.
GSI has the exciting potential to be used as a routine scan acquisition
mode offering additional anatomical and functional information to
help expedite and assist in an accurate CT diagnosis.
Select from 101
monochromatic energy levels
for image visualization.
Visualize virtual non-contrast
like image
View material density and
effective atomic number
images to discriminate tissue
type.
Use image overlay tool to fuse
material and effective atomic
number information on
monochromatic image
VOI tool to selectively visualize
a volume of interest.
GSI Viewer
Visit us:
www.gehealthcare.com/aw/
applications/gsi-viewer/
Features
Material Decomposed images
allow for the separation of
materials like calcium, iodine, and
water.
Visualize a virtual non-contrast like
image using the water-iodine basis
pair image.
Adjusting monochromatic energy
levels can optimize image contrast
and reduce beam-hardening
artifacts.
Discriminate different tissue types
based on material density and
monochromatic image data.
Image overlays to visualize
different material attributes in a
single view.
Vessel analysis to evaluate the
extent of lumen occlusion when
used with VesselIQ Xpress
Iodine suppressed images with the
dynamic range of regular CT
images in addition to a virtual noncontrast like image using the
water-iodine basis pair.
System Requirements
AW Workstation Volume Share 4.
AW Server
Recommendations
16 GB RAM
2 display monitors (compatible with
one or two monitor systems).
Regulatory Compliance
This product complies with the
European CE marking regulation
following Medical Devices Directive:
Directive 93/42/EEC, dated 14 June
1993.
Intended Use
The GSI Viewer accepts images from
a CT System that can acquire CT
images using
different kV levels of the same
anatomical region of a patient in a
single rotation from a
single source. The differences in the
energy dependence of the
attenuation coefficient of the
different materials provide
information about the chemical
composition of body materials. This
approach enables images to be
generated at energies selected from
the available spectrum to visualize
and analyze information about
anatomical and pathological
structures.
GSI provides information of the
chemical composition of renal calculi
by calculation and graphical display
of the spectrum of effective atomic
number. GSI Kidney stone
characterization provides additional
information to aid in the
characterization of uric acid versus
non-uric acid stones. it is intended to
be used on non-contrast studies as
an adjunct to current standard
methods for evaluating stone
etiology and composition.
© 2012 General Electric Company.
All rights reserved. Data subject to change.
GE and GE Monogram are trademarks of General Electric Company.
* Trademark of General Electric Company.
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