268
Abdomen
Hints
• You could repeat the same protocol simply by click-
ing the chronicle with the right mouse button for
“repeat“. E.g. when both non-contrast and contrast
studies are required.
• Delayed scans may be required for the kidneys &
bladder.
• If you want to use this protocol for a two-phase
study, repeat the same protocol as mentioned
below, and choose start delay time for arterial phase
as 20 - 25 sec. In this case, the thin slice reconstruc-
tion can also be used for post-processing. Do not
administer oral contrast medium, as this impairs the
editing of MIP/SSD/VRT images. Water could be used
instead if necessary.
• 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– 50 sec. It may be necessary to use a thinner col-
limation.
Contrast medium IV injection
Start delay 50 – 60sec.
Flow rate 3.0 ml/sec.
Total amount 100 ml