Siemens SOMATOM SENSATION CARDIAC A60 - Manual (Page 30)

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HeartView CT
How to do it
Calcium Scoring
This application is used for identification and quanti-
fication of calcified lesions in the coronary arteries. It
can be performed with both ECG triggering (sequen-
tial scanning) and gating (spiral scanning) techniques.
The following scan protocols are predefined:
• CaScoreSpiStd
– Standard spiral scanning protocol with ECG gating
and a 0.42 s Rotation Time
• CaScoreSpiStd0.5s
– Standard spiral scanning protocol with ECG gating
and a 0.5 s Rotation Time
• CaScoreSeqStd
– Sequential scanning protocol with ECG triggering
Hints in General:
• Kernel B35f is dedicated to calcium scoring studies.
To ensure the best image quality and correlation to
known reference data, other kernels are not recom-
mended.
• Use the ECG triggered protocol generally except for
patients with arrhythmia. Use the ECG gated protocol
when accuracy and/or reproducibility are essential,
e. g. follow-up studies of calcium scoring or compari-
son studies with conventional angiography.
• The protocol with 0.42 s Rotation Time can be
applied to all examinations for HeartView CT.
Temporal resolution for cardiac imaging can be
achieved at down to 105 ms.
The temporal resolution for the protocol with 0.5 s
Rotation Time can be achieved at down to 125 ms.
• We recommend a tube voltage of 120 kV. If the tube
voltage is lowered to 80 kV please use at least effec-
tive mAs 250. The use of 80 kV is not advised for large
patients.