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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 F

DOI: 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.

GroupPulmonary trunkLeft pulmonary arteryRight pulmonary arterySuperior vena cava
SNRCNRSNRCNRSNRCNRAI
120 kVp22.35±4.9921.84±6.5523.06±6.2821.83±6.5420.68±5.7621.25±6.0163.38±34.39
55 keV40%ASIR-V21.33±4.8721.15±5.7121.33±4.8720.93±5.8821.36±5.2320.84±5.6727.97±13.66b
50%ASIR-V23.76±5.5923.62±6.6123.76±5.5923.48±6.6823.79±6.04b 23.37±6.3925.99±17.71b
60%ASIR-V27.09±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-V31.16±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-V36.98±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 keV40%ASIR-V20.09±4.12b 21.84±6.0119.79±4.10b 21.59±5.9919.55±4.5121.33±6.1225.90±15.51b
50%ASIR-V22.52±4.8224.48±6.76b 21.88±4.7724.15±6.7721.48±5.3123.92±7.04b 24.07±15.92b
60%ASIR-V25.92±5.90b 28.43±7.94b 24.66±5.6328.09±8.02b 24.16±6.44b 27.88±8.21b 22.55±15.70b
70%ASIR-V29.93±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-V35.76±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 keV40%ASIR-V19.08±3.81b 20.13±5.5518.83±3.87b 19.86±5.4718.45±4.42b 19.67±5.6422.04±14.62b
50%ASIR-V21.49±4.5522.78±6.3020.90±4.39b 22.46±6.2920.57±4.9522.29±6.4421.12±14.02b
60%ASIR-V24.74±5.59b 26.44±7.40b 23.64±5.4026.07±7.47b 23.06±6.05b 25.87±7.63b 19.52±13.89b
70%ASIR-V28.63±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-V33.51±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 keV40%ASIR-V18.25±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-V20.44±4.17b 21.21±5.8519.97±4.09b 20.91±5.8319.64±4.6020.69±5.9818.78±12.49b
60%ASIR-V23.53±5.1624.663±6.81b 22.63±5.0024.35±6.84b 22.03±5.6524.06±6.99b 17.54±12.18b
70%ASIR-V27.47±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-V32.58±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
Statistic53.33840.56938.61438.12728.04137.5473.525
P valuea 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,

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750