User Guide

120
Abdomen
Hints
• Do not administer oral contrast medium, as this
impairs the editing of MIP/SSD/VRT images. Use
water instead if necessary.
• Water, rather than positive oral contrast agents
should be used. Give the last cup of 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. Furthermore, this
also ensures exact positioning for the CTA spiral.
• 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 collimation of
e.g. 2.5
mm.
C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book Page 120 Friday, April 8, 2005 9:55 AM