Contrast Medium; The Basics - Siemens SOMATOM Manual

Contrast Medium

Contrast Medium

The Basics

The administration of intravenous (IV) contrast mate-
rial during spiral scanning improves the tissue and
lesion characterization, as well as the opacity of ves-
sels. The contrast scan will yield good results only if
acquisition is performed during the optimal phase of
enhancement in the region of interest. Therefore, it is
essential to initiate the acquisition with the correct
start delay. Since multislice spiral CT can provide much
faster speeds and shorter acquisition times, it is even
more critical to get the right timing to achieve optimal
results.
10 s scan
40 s scan
Longer scan time Shorter scan time
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