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©The Author(s) 2023.
World J Radiol. Feb 28, 2023; 15(2): 32-41
Published online Feb 28, 2023. doi: 10.4329/wjr.v15.i2.32
Published online Feb 28, 2023. doi: 10.4329/wjr.v15.i2.32
Table 1 Computed tomography parameters for the conventional and multi-modality treatment groups
Dose group | Conventional group | Multi-modality group |
Tube voltage, kV | 100 | 80 |
Tube current, mA | Smart milliampere | 80% smart milliampere |
D-FOV, mm | 220 | 220 |
Rotation time, s | 0.275 | 0.275 |
Thickness, mm | 0.5 | 0.5 |
Interval, mm | 0.5 | 0.5 |
AIDR3D | Standard EU10 | Standard EU10 |
Scanning method | ECG gating | ECG gating |
Cardiac cycle | 30%-80% | 60%-80% |
Scan position | Conventional | Isocentric |
Scan length | 140 mm | 140 mm |
Table 2 Characteristics of the two groups
Group, n | Sex, F/M | Age, yr | BMI, kg/m2 | CTDvol, mGy | DLP, mGy × cm | ED, mSv |
A1, n = 82 | 31/51 | 59.59 ± 9.66 | 23.06 ± 1.95 | 5.89 ± 1.85 | 80.58 ± 24.80 | 1.13 ± 0.36 |
A2, n = 36 | 19/20 | 64.15 ± 13.28 | 22.58 ± 1.96 | 17.92 ± 8.02 | 250.90 ± 112.25 | 3.36 ± 1.30 |
P value | 0.43 | 0.17 | 0.89 | 0.00 | 0.00 | 0.00 |
Table 3 Computed tomography values and objective image quality scores for the aortic roots and proximal coronary vessels
Group, n | Aortic root, HU | Noise | ||||
A1, n = 82 | 512.18 ± 108.22 | 477.20 ± 117.93 | 485.88 ± 4100.40 | 15.52 ± 4.73 | 66.00 ± 25.30 | 41.32 ± 16.13 |
A2, n = 39 | 601.92 ± 125.34 | 534.67 ± 117.33 | 546.99 ± 109.30 | 19.29 ± 6.26 | 54.28 ± 17.72 | 38.45 ± 12.06 |
P value | 0.07 | 0.32 | 0.37 | 0.00 | 0.00 | 0.00 |
Table 4 Subjective image quality scores and the number of score segments in the two groups
Group | All segments | 5 | 4 | 3 | 2 | 1 | Average IQ score |
A1 | 1085 | 420 (38.71%) | 611 (56.48%) | 45 (4.15%) | 6 (0.55%) | 1 (0.09%) | 4.46 ± 0.59 |
A2 | 518 | 258 (49.81%) | 232 (44.79%) | 19 (3.67%) | 8 (1.54%) | 1 (0.19%) | 4.45 ± 0.62 |
P value | 0.12 |
- Citation: Hu XL, Huang PK, Zhang M, Chen J, Xiao MQ. Effects of combining multiple dose reduction techniques on coronary computed tomography angiography. World J Radiol 2023; 15(2): 32-41
- URL: https://www.wjgnet.com/1949-8470/full/v15/i2/32.htm
- DOI: https://dx.doi.org/10.4329/wjr.v15.i2.32