Table 8.
Profession | Intensive care physician (n = 6, 72 procedures) |
Pediatrician (n = 2, 6 procedures) |
Radiological technologist (n = 3, 13 procedures) |
ANOVA∗ (P value) | Total (n = 11, 91 procedures) |
||||
---|---|---|---|---|---|---|---|---|---|
Mean ± SD | Median [range] | Mean ± SD | Median [range] | Mean ± SD | Median [range] | Mean ± SD | Median [range] | ||
Analysis point | |||||||||
Outside radiation safety glasses (Hp(3)) [mSv] | 0.55 ± 0.39 | 0.49 [0.12–2.49] | 0.53 ± 0.42 | 0.30 [0.15–1.18] | 0.41 ± 0.41 | 0.28 [0.07–1.64] | 0.094 | 0.53 ± 0.39 | 0.43 [0.07–2.49] |
Inside radiation safety glasses (Hp(3)) [mSv] | 0.26 ± 0.15 | 0.23 [0.05–1.05] | 0.23 ± 0.15 | 0.14 [0.09–0.46] | 0.19 ± 0.15 | 0.15 [0.06–0.65] | 0.108 | 0.25 ± 0.15 | 0.21 [0.05–1.05] |
CT imaging setting, CT dose index | |||||||||
Tube voltage [kVp] | 120 ± 3 | 120 [100–135] | 107 ± 9 | 100 [100–120] | 117 ± 7 | 120 [100–120] | <0.001 | 120 ± 6 | 120 [100–135] |
Tube current [mA] | 4,131.2 ± 2,522.4 | 3,847.5 [968.0–13,196.0] | 720.8 ± 741.6 | 339.0 [211.3–2,148.0] | 1,650.0 ± 1,253.8 | 1177 .0 [116.0–5,178.0] | <0.001 | 3,532.2 ± 2,570.1 | 3,373.0 [67.0–13,196.0] |
CTDIvol [mGy] | 44.5 ± 24.7 | 48.6 [8.8–119.9] | 23.6 ± 14.4 | 21.0 [2.2–42.5] | 51.8 ± 25.4 | 45.3 [10.9–100.0] | 0.650 | 41.5 ± 25.0 | 44.0 [2.2–119.9] |
DLP [mGy・cm] | 1,802.2 ± 947.7 | 1,561.0 [280.4–4,824.6] | 474.2 ± 367.8 | 360.1 [26.9–1,063.4] | 1,072.0 ± 703.1 | 862.9 [18.1–2,543.8] | <0.001 | 1,577.7 ± 972.5 | 1,462.8 [18.1–4,824.6] |
CTDIvol, volume computed tomography dose index.
DLP, dose-length product.
Hp(3), 3-mm dose-equivalent (personal dose equivalent).
SD, standard deviation.
Homogeneity of the three profession groups was confirmed using the Kruskal-Wallis test.