Contrast Media Tools - GE Revolution CT User Manual

Generic description
Prescribing the reconstruction parameters prior to scan acquisition Primary and Secondary
Prescribing the reconstruction parameters after scan acquisition
Reconstruction property that determines sharpness or smoothness
of image in the axial plane
Helical interpolation options to achieve a wider or narrower section
sensitivity profile
Nominal width of reconstructed image along the z-axis
Distance between two consecutive reconstructed images
Fast but lower-quality reconstructed images for rapid review of en‐
tire exam
Off-center reconstruction coordinates
Flip or rotate the image orientation
Image modifications to alter sharpness or smoothness (done in im‐
age space without reconstructing images)

1.5 Contrast media tools

Table 5: Contrast media tool terms
Generic description
Bolus tracking: Scanner feature to automatically initiate a prescri‐
bed axial, helical or dynamic scan when a threshold level of con‐
trast enhancement is reached at a specified region of interest
Test Bolus: Scan mode used to measure the contrast transit time
using a small injection of contrast media
Time-attenuation curve (TAC): Graph of the contrast enhancement
versus time
Threshold: CT number (HU) where bolus tracking tool will trigger
the system to begin the scan
Scanner feature used to quantitatively evaluate the TAC
Monitoring delay: Time from injection to the start of monitoring
scans (Time 1 in figure below)
Monitoring interval: Time between consecutive monitoring scans to
(Time 2 in figure below)
Appendix D Lexicon
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
GE name
recon
Post Scan Secondary re‐
con
Algorithm
Full (narrower) or Plus
(wider) mode
Thickness (mm)
Interval
Quality Check
RL Center;
AP Center
Flip/rotate
Image Filters
GE name
Smart Prep
Take axial scans at zero
table feed and process
with MIROI
Smart Prep graph or MIR‐
OI graph
Transition ROI Threshold
MIROI (multiple image re‐
gion of interest)
Monitoring Delay
Monitor ISD (InterScan
Delay)
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