Contrast Medium
125
IV Injection*The administration of a contrast medium depends on
the indication and on the delay times to be used during
the examination. The patients weight and circulatory
situation also play a role. In general, no more than 3ml
per kg of body weight for adults and 2 ml per kg of
body weight for children should be applied.
For a CTA study (arterial phase), the principle is to keep
the contrast flowing throughout the duration of the
scan. Thus, the total amount of contrast medium
needed should be calculated with the following for-
mula:
CARE Bolus CT or Test B olus may be used for optimal
contrast bolus timing. Please refer to the special proto-
cols.
To achieve optimal results in contrast studies, the use
of CARE Bolus CT is recommended. In a case where it
is not available, use Test Bolus. Once completed, load
images into DynEva task card for calculation of Time
to Peak enhancement.
For multiphase examinations, for example, three-
phase liver, the maximum start delay can be set to
600sec. The countdown of the delay always starts
after scanning of the previous phase.
*For more information regarding the general use of
drugs and doses mentioned in this guide, please
refer to page 2.
CM = (start delay time + scan time) x flow rate.