Operating instructions

Abdomen
365
Hints
• If you want to use this protocol for a two-phase
study, repeat the same protocol as mentioned
below, and chose start delay time for arterial phase
as 20-25 sec. In this case, the thin slice reconstruc-
tion can also be used for postprocessing.
Do not administer oral contrast medium, as this
impairs the editing of MIP/SSD/VRT images. Water
could be used instead if necessary.
• You can repeat the same protocol simply by clicking
the chronicle with the right mouse button for
repeat. E.g. when both non-contrast and contrast
studies are required.
• Water, rather than positive oral contrast agents
should be used. Give the last cup 200 ml just prior to
positioning the patient. To ensure adequate filling of
the duodenal loop, lay the patient on the right side
for 5 minutes before performing the topogram.
• A pre-contrast examination is usually performed
only if no CT scans were previously acquired, to
exclude calculi in the common bile duct and to visu-
alize possible lesions in the liver.
• For pancreatic studies, the arterial phase acquisition
can be acquired later with a start delay of 40 sec. –
50 sec. It may be necessary to use a thinner collima-
tion of 3 mm.