28 April 2023>: Clinical Research
Individualized Scan Protocol Based on Body Mass Index in Dual-Energy Computed Tomography Pulmonary Angiography to Reduce Radiation and Contrast Doses with Improved Image Quality
Xin Fang E* , Xiaoyu Tong E* , Yijun Liu A* , Wei Wei B , Xu Wang D , Beibei Li C , Shigeng Wang F , Yong Fan FDOI: 10.12659/MSM.939234
Med Sci Monit 2023; 29:e939234
Table 2 Comparison of objective image quality of different monochromatic images combined with ASIR-V reconstruction in the individualized group.
Group | Pulmonary trunk | Left pulmonary artery | Right pulmonary artery | Superior vena cava | ||||
---|---|---|---|---|---|---|---|---|
SNR | CNR | SNR | CNR | SNR | CNR | AI | ||
120 kVp | 22.35±4.99 | 21.84±6.55 | 23.06±6.28 | 21.83±6.54 | 20.68±5.76 | 21.25±6.01 | 63.38±34.39 | |
55 keV | 40%ASIR-V | 21.33±4.87 | 21.15±5.71 | 21.33±4.87 | 20.93±5.88 | 21.36±5.23 | 20.84±5.67 | 27.97±13.66b |
50%ASIR-V | 23.76±5.59 | 23.62±6.61 | 23.76±5.59 | 23.48±6.68 | 23.79±6.04b | 23.37±6.39 | 25.99±17.71b | |
60%ASIR-V | 27.09±6.70b | 27.47±7.79b | 27.09±6.70b | 27.26±7.97b | 27.21±7.45b | 27.15±7.67b | 24.69±17.45b | |
70%ASIR-V | 31.16±8.18b | 31.84±9.06b | 31.16±8.18b | 31.54±9.43b | 30.81±9.18b | 31.40±9.02b | 23.41±17.35b | |
80%ASIR-V | 36.98±10.90b | 38.91±11.91b | 36.98±10.90b | 38.52±12.46b | 36.21±12.22b | 38.29±11.90b | 21.99±17.51b | |
60 keV | 40%ASIR-V | 20.09±4.12b | 21.84±6.01 | 19.79±4.10b | 21.59±5.99 | 19.55±4.51 | 21.33±6.12 | 25.90±15.51b |
50%ASIR-V | 22.52±4.82 | 24.48±6.76b | 21.88±4.77 | 24.15±6.77 | 21.48±5.31 | 23.92±7.04b | 24.07±15.92b | |
60%ASIR-V | 25.92±5.90b | 28.43±7.94b | 24.66±5.63 | 28.09±8.02b | 24.16±6.44b | 27.88±8.21b | 22.55±15.70b | |
70%ASIR-V | 29.93±7.39b | 32.99±9.20b | 28.09±7.72b | 32.62±9.36b | 27.02±8.02b | 32.36±9.57b | 21.23±15.43b | |
80%ASIR-V | 35.76±9.98b | 39.98±11.40b | 32.37±9.77b | 39.57±11.79b | 31.96±10.63b | 39.29±12.01b | 19.73±15.37b | |
65 keV | 40%ASIR-V | 19.08±3.81b | 20.13±5.55 | 18.83±3.87b | 19.86±5.47 | 18.45±4.42b | 19.67±5.64 | 22.04±14.62b |
50%ASIR-V | 21.49±4.55 | 22.78±6.30 | 20.90±4.39b | 22.46±6.29 | 20.57±4.95 | 22.29±6.44 | 21.12±14.02b | |
60%ASIR-V | 24.74±5.59b | 26.44±7.40b | 23.64±5.40 | 26.07±7.47b | 23.06±6.05b | 25.87±7.63b | 19.52±13.89b | |
70%ASIR-V | 28.63±6.99b | 30.66±8.60b | 26.61±6.64b | 30.23±8.74b | 25.88±7.64b | 29.99±8.92b | 18.48±13.49b | |
80%ASIR-V | 33.51±10.38b | 37.12±10.84b | 30.88±9.12b | 36.63±11.18b | 29.49±10.09b | 36.44±11.25b | 17.43±13.63b | |
70 keV | 40%ASIR-V | 18.25±3.54b | 18.86±5.16b | 17.70±4.13b | 18.58±5.13b | 17.83±3.93b | 18.42±5.33b | 19.96±12.88b |
50%ASIR-V | 20.44±4.17b | 21.21±5.85 | 19.97±4.09b | 20.91±5.83 | 19.64±4.60 | 20.69±5.98 | 18.78±12.49b | |
60%ASIR-V | 23.53±5.16 | 24.663±6.81b | 22.63±5.00 | 24.35±6.84b | 22.03±5.65 | 24.06±6.99b | 17.54±12.18b | |
70%ASIR-V | 27.47±6.79b | 28.60±7.85b | 25.32±6.18b | 28.22±7.99b | 24.76±7.15b | 27.92±8.16b | 16.28±11.99b | |
80%ASIR-V | 32.58±8.81b | 34.64±9.89b | 29.50±8.47b | 34.19±10.17b | 28.37±9.57b | 33.84±10.38b | 15.13±11.84b | |
Statistic | 53.338 | 40.569 | 38.614 | 38.127 | 28.041 | 37.547 | 3.525 | |
P value | a | a | a | a | a | a | a | |
SNR – signal-to-noise ratio; CNR – contrast-to-noise ratio; AI – artifacts index. a Individuation group within-group comparison, b comparison with the standard group, |