Contrast Medium
129
Test Bolus
This is a low dose sequential protocol without table
feed used to calculate the start delay of a spiral scan to
ensure optimal enhancement after the contrast
medium injection. The syngo Dynamic Evaluation
function may be used to generate the time density
curve. You will find the Test Bolus scan protocol in the
chapter Specials.
Method
1.Select the spiral mode that you want to perform and
then Append the Test B olus mode under Special
protocols.
2.Insert the Test Bol us mode above the contrast spiral
scan of interest using cut/paste (with right mouse
button).
3.Perform the topogram and define the slice position
for the test bolus.
4.Check the start delay, number of scans, and cycle
time before loading the mode.
5.A test bolus with 10 – 20 ml is then administered
with the same flow rate as during the subsequent
spiral scan. Start the contrast media injection and
the scan at the same time.