Special Instructions On Care Vision Ct - Siemens SOMATOM Emotion syngo CT 2007E Operator's Manual

Safety
Radiation exposure to patients
syngo CT 2007E
02/2008

Special instructions on CARE Vision CT

CARE Vision CT uses scan parameters and operating conditions
which are unique and may require additional care and radiation
protection measures. In any case the scan time should be kept
as short as possible to avoid unnecessary exposure.
CARE Vision CT applies continuous exposure at moderate mA
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levels. Due to the potentially long scan times and the limited
scan volume, the dose for certain slices may increase to levels
significantly higher than those known from standard CT appli-
cations. The patient's exposure level is usually estimated by
CTDI-vol (which is designed to give the average dose in the
scanned volume).
Before starting the scan, the dose rate (CTDIvol in mGy per sec-
ond) is displayed on the monitor. During the CARE Vision CT
scan, the accumulated dose (CTDIvol) reflecting the patient
exposure is displayed on the monitor. The display scale ranges
from zero to 3000mGy. If the table is shifted during the exam,
the accumulated dose will be distributed to different slices and
will be lower than indicated by the display. When a new scan is
loaded, the dose display again starts from zero.
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