Keywords:
Arteriosclerosis, Radiation safety, CT, Cardiac
Authors:
T. Gassenmaier, A. Kunz, A. Kosmala, T. A. Bley, B. Petritsch; Würzburg/DE
Results
Mean age of patients was 57.6 years ± 12.3 (standard deviation).
Mean body mass index was 27.9 kg/m2 ± 6.3 (range,
17.4 - 50.4 kg/m2).
Prospectively ECG-gated high-pitch spiral (hereafter: high-pitch spiral) was used in 52 patients (35.4%),
prospectively ECG-gated sequential acquisition (hereafter: sequential acquisition) in 55 (37.4%),
and retrospectively ECG-gated spiral acquisition (hereafter: retrospective spiral) in 40 patients (27.2%).
Median effective radiation dose was 0.54 mSv (interquartile range [IQR] 0.42 - 0.64 mSv) for CCS,
0.80 mSv (IQR 0.60 - 0.98 mSv) for high-pitch spiral,
1.06 mSv (IQR 0.80 - 2.39 mSv) for sequential acquisition,
and 7.35 mSv (IQR 4.08 - 9.82 mSv) for retrospective spiral (all p<0.001).
Median SSDE was 2.2 mGy (IQR 2.0 - 2.7 mGy) for CCS,
3.6 mGy (IQR 2.9 - 4.7 mGy) for high-pitch spiral,
8.3 mGy (IQR 5.5 - 14.2 mGy) for sequential acquisition,
and 35.8 mGy (IQR 23.6 - 45.0 mGy) for retrospective spiral (all p<0.001).
Close correlations with effective radiation dose were observed for sum of AP and lateral dimension (r=0.80),
effective diameter (r=0.79),
and BMI (r=0.78) (all p<0.001).