GE Healthcare Discovery CT750 HD - Manual (Page 28)

Gemstone
Spectral Imaging
Gemstone Spectral
Imaging (GSI) is a unique
dual energy technique that
uses rapid kV switching
and Gemstone Detector
technology to acquire and
generate material density
data. This data can be
used to separate materials
and derive monochromatic
spectral images using
a projection-space
reconstruction algorithm.
Virtual noncontrast-like imaging
Gemstone Spectral Imaging can subtract iodine from
images to generate a virtual noncontrast-like image.
Note the kidney stone is obscured in the IV contrast
image, but visualized in the water density image.
70 keV Spectral
MD Water
Material Separation
GSI provides information about the chemical composi-
tion of body materials. This capability enables the user
to easily separate calcium, iodine and water to aid in
the characterization of pathology.
28 GE Healthcare Discovery CT750 HD