Prospective Study
Copyright ©2014 Baishideng Publishing Group Inc.
World J Radiol. Jun 28, 2014; 6(6): 381-387
Published online Jun 28, 2014. doi: 10.4329/wjr.v6.i6.381
Table 1 Demographics n (%)
Clinical characteristicsPopulation (n = 60)
Age (yr, mean ± SD)73.4 ± 7.1
Male gender30 (50)
BMI (kg/m², mean ± SD)25.9 ± 4.5
BSA (m², mean ± SD)1.8 ± 0.2
Mean heart rate (bpm, mean ± SD)73.0 ± 15.7
Additional negative chronotropic drugsNone
Table 2 scan and reconstruction parameters
ParametersgCCTngCCT
Scan parameters
TechniqueSpiralSpiral
kV120120
mAs15030
Gantry rotation time (ms)330330
Individual detector width (mm)1.20.6
Number of detectors20 × 232 × 2
ECG gatingYesNo
Prospective ECG modulation of tube currentYesNo
Table feed/s (mm)14.486.4
Pitch0.21.5
Scan rangeCarina-ApexChest
DLP (mGy; mean ± SD)116 ± 5184 ± 16a
Effective dose (mSv; factor = 0.014; mean ± SD)2.0 ± 0.91.2 ± 0.5a
Effective dose (mSv; factor = 0.014; median, IQR)1.61; 1.15-2.01.13; 1.05-1.20a
Reconstruction parameters
Effective slice width (mm)3.05.0
Reconstruction increment (mm)1.55.0
FOV (mm)140-160250-300
Kernel filteringB35f1B30f(medium-smooth)
Table 3 coronary artery calcium score values
Parameters (mean ± SD)gCCTngCCTDelta (absolute)DeltaPrR2
Volume418.1 ± 746.5332.0 ± 596.9-86.1 ± 263.8-21%< 0.050.9470.896
Mass88.9 ± 151.277.9 ± 140.5-11.1 ± 35.5-12%< 0.050.9730.946
Agatston480.8 ± 853.7427.7 ± 776.3-53.1 ± 188.4-11%< 0.050.9780.956
Table 4 Cardio vascular risk stratification based on absolute coronary artery calcium score classes n (%)
CACS classgCCTngCCT
06 (10)10 (16.7)
1-106 (10)7 (11.7)
11-10014 (23.3)10 (16.7)
101-40014 (23.3)17 (28.3)
400-100014 (23.3)10 (16.7)
> 10006 (10)6 (10)